COMPOUND NOUNS

Definition :
When we put two or more words together to create a new word, we have made a compound noun.

Nouns of more than one word are called compound nouns.

e.g.

noun + noun police officer ice-creamfirefighter
noun + verb carwash haircut milkshake
verb + noun cross-road cookbookjump rope
adjective + noun black eye blue jeans hotdog
adverb + noun on-lookerdowntime overtime
adverb + verb input output upswing

Compound nouns can take three forms: hyphenated, solid and open.

HYPHENATED COMPOUNDS

When two or more words are connected by one or more hyphens, the result is a hyphenated compound. Some compound words are hyphenated to avoid being misread or ambiguous.

e.g.

sister-in-lawjack-in-the-boxstate-of-the-art
shout-outmind-setfive-year-old

SOLID COMPOUNDS

Solid compounds are words that are used as a single unit of meaning and it is closed up as solid, or closed, compounds.

e.g.

rollbackrestroomwhatever
breakfastneedlepointslingshot

OPEN COMPOUNDS

Sometimes no hyphenating or closing up is necessary to form a compound. Open compounds are words that are used as a single unit of meaning but are still written separately as two words.

e.g.

wet nurseroller coasterwhatever
sleeping bagfirst aid mug shot

Learn More about Compound Words:

Some Important Compound Words - (Click Here)

Learning Competency

Modal auxiliaries Vs Primary auxiliaries
Primary auxiliaries are be, do, have. They are used to form tenses and to frame short answers.
Modal auxiliaries are will, would, may, might, shall, should, can, could, must, dare, need, used, ought. They are used to express moods.