Grammar Monster
Grammar Monster

Plural of Air

The Quick Answer
Air is a mass noun. It has no plural form.

The Plural of Air

Air is a mass noun. It has no plural form.
  • The three major constituents of air are nitrogen, oxygen, and argon.
  • Air pressure varies with location and weather.
The table below shows the standard rules for forming the plurals of nouns in English.

Type Example of Type Forming the Plural Plural
Most Nouns cat
scythe
add s cats
scythes
Noun Ending s, sh, ch, x or z bus
dress
add es buses
dresses
Nouns ending [consonant] o mango
zero
tomato
add either s or es
(There are no rules for this - you have to know.)
mangoes or mangos
zeros
tomatoes
Nouns ending [vowel] o patio
ratio
add s patios
ratios
Nouns ending [consonant] y story
penny
change the y to an i and add es stories
pennies
Nouns ending [vowel] y storey ()
donkey
add s storeys
donkeys
Mass nouns air
rice
some nouns do not have a plural form
air
rice
Nouns ending f or fe dwarf
knife
ves and/or s
(There are no rules - you have to know.)
dwarfs
knives
Exceptions goose
louse
some nouns undergo a vowel or letters change geese
lice
More exceptions salmon
sheep
some nouns do not change at all salmon
sheep

Why Is There Confusion over the Plural of Air?

Confusion arises because air is a mass noun. A mass noun is a noun without a plural form. They refer to items that can't be counted (e.g., music, milk, chalk).