Plural Formation in Portuguese

In Brief

Most Portuguese nouns form the plural with -s: livro → livros and cidade → cidades. Words ending in -r or -z normally add -es, while several common endings change: homem → homens, animal → animais, and coração → corações. The ending -ão has three possible plurals, so its plural is best learned with each new word.

Overview

A noun is a word for a person, place, thing, or idea, such as amigo (friend), cidade (city), or opinião (opinion). Number tells us whether the noun is singular—one—or plural—more than one. Portuguese marks number directly on the noun much more consistently than English does: um livro becomes dois livros.

Plural formation is an A1 topic because it appears almost immediately in shopping, introductions, descriptions, and everyday questions. The beginner rule is simple: if a word ends in a vowel, add -s. However, Portuguese spelling also contains predictable changes after -m and -l, as well as a less predictable group of words ending in -ão.

The noun's gender—masculine or feminine—usually stays the same in the plural. What changes is its number, and words connected to it normally change too: o livro novo → os livros novos and a cidade antiga → as cidades antigas. This is called agreement, meaning that articles and adjectives match the noun.

How It Works

1. The beginner rule: add -s after a vowel

Most nouns ending in an oral vowel or a vowel-like ending simply take -s. An oral vowel is pronounced through the mouth, without the nasal sound heard at the end of homem.

Singular	Plural	Meaning
livro	livros	book(s)
casa	casas	house(s)
cidade	cidades	city/cities
táxi	táxis	taxi(s)
museu	museus	museum(s)
mãe	mães	mother(s)

This also applies to many words ending in a diphthong (two vowel sounds joined in one syllable), as in museu → museus and pai → pais.

2. Words ending in -r or -z add -es

For the common consonant endings -r and -z, add -es:

Singular	Plural	Meaning
mulher	mulheres	woman/women
professor	professores	teacher(s)
flor	flores	flower(s)
rapaz	rapazes	boy(s)
vez	vezes	time(s), occasion(s)

The extra vowel makes the plural ending pronounceable. Notice that “consonant + -es” is a useful first approximation, but it is not a rule for every consonant: -m, -l, -s, and -x follow patterns of their own.

3. Final -m changes to -ns

Replace final -m with -ns:

Singular	Plural	Meaning
homem	homens	man/men
jardim	jardins	garden(s)
viagem	viagens	journey/journeys
bom	bons	good (masculine)

Do not add -s after the existing m: forms such as homems are incorrect.

4. Final -l usually changes to -is

The broad pattern is to remove final -l and add -is, but the written accent may change to preserve the word's stress (the syllable pronounced most strongly).

Ending	Singular	Plural	Change
-al	animal	animais	-al → -ais
-el	papel	papéis	-el → -éis
-ol	farol	faróis	-ol → -óis
-ul	azul	azuis	-ul → -uis

Words ending in -il split into two groups:

• If the final syllable is stressed, use -is: funil → funis, barril → barris.
• If the final syllable is not stressed, use -eis: fácil → fáceis, difícil → difíceis, útil → úteis.

Many words in this section are adjectives as well as nouns, but the spelling rule is the same: um exercício fácil → dois exercícios fáceis.

5. Words ending in -ão: three plural patterns

There is no single dependable plural for every word ending in -ão. The three patterns are -ões, -ães, and -ãos.

Pattern	Singular	Plural	Meaning
-ão → -ões	coração	corações	heart(s)
-ão → -ões	opinião	opiniões	opinion(s)
-ão → -ões	avião	aviões	airplane(s)
-ão → -ães	pão	pães	bread/loaves
-ão → -ães	cão	cães	dog(s)
-ão → -ães	alemão	alemães	German(s)
-ão → -ãos	mão	mãos	hand(s)
-ão → -ãos	irmão	irmãos	brother(s), siblings
-ão → -ãos	cidadão	cidadãos	citizen(s)

-ões is the most common pattern, but guessing is still risky. Learn an -ão noun together with its plural: uma estação, duas estações. Some words have more than one accepted plural, sometimes with differences in frequency or meaning; dictionaries are the safest guide.

6. Words ending in -s or -x

The stress pattern matters for words ending in -s:

• A word with stress on the final syllable generally adds -es: país → países, mês → meses, português → portugueses.
• A word whose final -s is in an unstressed syllable generally does not change: o lápis → os lápis, o ônibus → os ônibus (common in Brazil), o pires → os pires.

Many nouns ending in -x are also unchanged: o tórax → os tórax. The article or another agreeing word makes the number clear.

7. Make the whole noun phrase agree

A noun phrase is the noun together with words that belong to it, such as an article or adjective. In Portuguese, plural marking is not confined to the noun.

Singular phrase	Plural phrase	English
o livro novo	os livros novos	the new book(s)
uma cidade bonita	umas cidades bonitas	a beautiful city / some beautiful cities
este animal pequeno	estes animais pequenos	this small animal / these small animals
a minha opinião	as minhas opiniões	my opinion(s)

English often leaves an adjective unchanged (new book/new books), but Portuguese adjectives normally show number: novo/novos. Remembering the noun ending while forgetting the article or adjective produces an incomplete plural.

Examples in Context

Portuguese	English	Note
Tenho dois livros na mochila.	I have two books in my backpack.	Vowel + -s
Estas cidades são muito antigas.	These cities are very old.	The demonstrative and adjective agree too.
As mulheres trabalham no centro.	The women work downtown.	Final -r + -es
Comprámos três flores para a mesa.	We bought three flowers for the table.	Final -r + -es
Os rapazes jogam futebol no parque.	The boys play soccer in the park.	Final -z + -es
Há muitos jardins neste bairro.	There are many gardens in this neighborhood.	-m → -ns
As viagens foram longas.	The journeys were long.	viagem → viagens
Vimos vários animais na quinta.	We saw several animals on the farm.	-al → -ais
Preciso de dois papéis para o formulário.	I need two sheets of paper for the form.	-el → -éis
Os faróis do carro são azuis.	The car's headlights are blue.	azul → azuis
Estes exercícios são fáceis.	These exercises are easy.	Unstressed -il → -eis
Os corações aparecem no desenho.	The hearts appear in the drawing.	-ão → -ões
Comprámos dois pães frescos.	We bought two fresh loaves of bread.	-ão → -ães
Os dois irmãos moram em Lisboa.	The two brothers live in Lisbon.	-ão → -ãos
Quantos lápis tens?	How many pencils do you have?	The noun itself is unchanged.

Common Mistakes

Adding -s directly to a word ending in -m

• Wrong: dois homems
• Right: dois homens
• Why: Final -m changes to -ns; it does not remain before the plural ending.

Treating every consonant ending alike

• Wrong: dois animales
• Right: dois animais
• Why: Final -l normally changes to -is. The -es rule is useful for words ending in -r or -z, not for all consonants.

Using -ões for every word ending in -ão

• Wrong: duas mões
• Right: duas mãos
• Why: -ão has three plural patterns. Although -ões is common, familiar words such as mão, irmão, pão, and cão must be learned individually.

Changing an invariant word

• Wrong: os lápises
• Right: os lápis
• Why: Many words ending in unstressed -s do not change. The article os already signals the plural.

Pluralizing only the noun

• Wrong: a cidades bonita
• Right: as cidades bonitas
• Why: The article, noun, and adjective must agree in number. Gender remains feminine, while every variable word becomes plural.

Copying English irregular plurals into Portuguese

• Wrong: assuming homem needs a completely unrelated plural because English has man/men
• Right: homem → homens
• Why: Portuguese follows its own spelling patterns. Translate the meaning first, then form the Portuguese plural from the Portuguese word.

Usage Notes

Countable and uncountable meanings

Plural endings tell you how a word is formed, but context determines whether speakers normally count it. Pão can refer to bread as a substance, while dois pães commonly means two loaves or bread rolls. Similarly, papel can mean paper as a material, but papéis can mean sheets, documents, roles, or papers depending on context.

Brazilian and European vocabulary

The core plural rules are shared across Brazilian and European Portuguese. Regional vocabulary can produce different examples: Brazilian ônibus is unchanged in the plural (os ônibus), while European Portuguese normally uses autocarro → autocarros. Accent marks may differ in regional spelling, but this does not create a different general plural system.

Spelling and pronunciation belong together

Some plural changes also affect pronunciation and stress. Compare papel/papéis and farol/faróis. Do not learn these as silent letter substitutions: say the singular and plural aloud so that the written accent and the stressed syllable become one memory.

Beyond the Basics / Advanced Use

You do not need to master the following details at A1, but you will meet them in reading and formal writing.

Alternative plurals of some -ão words

A few -ão nouns allow competing plurals. For example, dictionaries record ancião with forms including anciãos, anciães, and anciões. Usage is not equally common everywhere, and different plurals can become associated with a particular meaning in some words. Treat dictionary information as word-specific rather than trying to invent a universal rule.

Plural forms can shift meaning

A plural may develop a conventional sense beyond “more than one.” Bem means “good” or “well” in several uses, while the noun bens often means assets or possessions. Férias means vacation or holidays and is normally used in the plural. Such vocabulary must be learned as an expression, not derived from spelling alone.

Compound nouns

A compound noun joins two or more words into one lexical unit. Their plurals depend on the structure of the compound, so they cannot all be handled by one beginner rule:

• Both variable elements may become plural: couve-flor → couves-flores.
• Only the main noun may change: palavra-chave → palavras-chave.
• A verb-based first element often stays fixed while the noun changes: guarda-chuva → guarda-chuvas.
• Some compounds remain unchanged, especially when the final element is already plural or the structure is fixed.

Compound plurals show some variation and are affected by spelling conventions. When a compound is unfamiliar, check a current dictionary.

Abbreviations, letters, and borrowed words

Modern Portuguese often adds -s to abbreviations and many borrowed nouns, but editorial conventions vary, especially with capital letters, punctuation, and foreign spellings. In careful writing, consult the style guide used in your region or publication rather than forcing a native ending onto every imported form.

Practice Tips

1. Learn nouns in pairs. For each new noun, record its article and plural: o coração — os corações, a mão — as mãos. This trains gender, number, and the difficult -ão pattern together.
2. Sort words by their final letters. Make small groups for vowel + -s, -r/-z + -es, -m → -ns, -l → -is, and the three -ão groups. Add five useful words to each group and say both forms aloud.
3. Expand complete phrases, not isolated words. Change a cidade bonita into as cidades bonitas or este papel importante into estes papéis importantes. This prevents the common habit of pluralizing the noun but forgetting agreement.

Related Concepts

• Prerequisite: Gender of Nouns — gender stays attached to the noun while its number changes, and both features control agreement.