common sense

It is common knowledge that he is a liar

a common boob

a common sight

Communications were temporarily dislocated by the bad weather

Communism can't work.

Communism needs democracy like the human body needs oxygen

community service

commutation ticket

to commute between home and work

commuter belt

compact disc

a company of good standing

He’s no company for you

to compare notes

to compare wisdom to gold

to compare apples and oranges

Compare the above illustration

Compare the illustration above

By/In comparison with the French, the British eat far less fish

On comparison, the Skoda was the more reliable of the two cars

Comparison with other countries is extremely interesting

On comparison, the Volkswagen was the more reliable of the two cars

to compass a person’s death

to compel someone to do something