Compound Nouns and Noun Modifiers (A2)

English often puts words together to name one thing: a bus stop, a bedroom or a toothbrush. These are compound nouns. You will learn how to order the words, use nouns to describe other nouns, form plurals and check spelling.

Two words, one name

A compound noun has two or more parts that work together as one name. Many compound nouns are made from two nouns.

The last noun usually tells you what the thing is. The first noun gives more information: what kind, what for or where.

Compound noun	What is it?	More information
bus stop	A stop	For buses
coffee cup	A cup	For coffee
kitchen table	A table	In a kitchen
apple juice	Juice	Made from apples

We waited at the bus stop.

Put the plates on the kitchen table.

Would you like some apple juice?

Not every compound noun begins with a noun. For example, blackboard combines the adjective black and the noun board.

Put the describing noun first

A noun before another noun is called a noun modifier. It describes the noun after it. This pattern appears in many compound nouns and other noun combinations.

Use describing noun + main noun:

A shop that sells shoes → a shoe shop.
A door for a car → a car door.
A bag for school → a school bag.

Word order matters. A school bus is a kind of bus, not a kind of school.

A coffee cup names a type of cup. It can be empty.

A cup of coffee tells us what is in the cup.

“I washed the coffee cups, then made a cup of coffee.”

Use a singular modifier in most cases

The first noun is usually singular, even when it refers to several things.

A shoe shop sells many shoes. We still use shoe, not shoes, before shop.

To make these combinations plural, change the main noun:

One	More than one
A bus stop	Two bus stops
A shoe shop	Three shoe shops
A toothbrush	Four toothbrushes
A businesswoman	Two businesswomen

The main noun keeps its usual plural form: woman → women.

Use two shoe shops, not two shoes shops.

However, some common combinations have a plural first word: sports centre and clothes shop. Learn these as complete expressions.

Quick check

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The children travel to school on a yellow .

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Check spaces and hyphens

Compound nouns have three common spellings. A hyphen is the short line in sister-in-law.

Spelling	Examples
Separate words	bus stop, shoe shop
One word	bedroom, toothbrush
With hyphens	sister-in-law, check-in

There is no simple spelling rule for every compound noun. Check a learner’s dictionary when you are unsure.

My bedroom is upstairs.

My sister-in-law lives near us.

Check-in opens at six.

In sister-in-law, the main noun is sister, so the plural is sisters-in-law, not sister-in-laws.

Use singular units before a noun

We also use a number and a unit, such as hour or year, together to describe a noun. Before the noun, keep the unit singular and use a hyphen.

Ordinary description	Before a noun
The journey takes two hours.	A two-hour journey
The course lasts three weeks.	A three-week course
The child is five years old.	A five-year-old child

Write a two-hour journey, not a two-hours journey.

But write “The journey takes two hours.” Here, hours is not before another noun, so it is plural.

Quick checklist

When you use a compound noun or a noun modifier:

Identify the main thing: a bus stop is a stop.
Put the describing noun first: shoe shop.
Usually keep that first noun singular: shoe shops.
Check special forms and spelling: sports centre, toothbrush, sisters-in-law.
With a number and unit before a noun, use a singular unit and hyphens: a two-hour journey.

1.Two words, one name

2.Put the describing noun first

3.Use a singular modifier in most cases

Try one question now.

4.Check spaces and hyphens

5.Use singular units before a noun

6.Quick checklist

Now make it stick.