carpet vs floor cover

carpet and floor cover both are nouns.

Word	Noun	Adjective	Verb	Adverb
carpet	Yes	No	Yes	No
floor cover	Yes	No	No	No

As nouns, floor cover is a hypernym of carpet; that is, floor cover is a word with a broader meaning than carpet:

carpet: floor covering consisting of a piece of thick heavy fabric (usually with nap or pile)
floor cover: a covering for a floor

Other hypernyms of carpet include floor covering, furnishing.

carpet (noun)	floor cover (noun)
floor covering consisting of a piece of thick heavy fabric (usually with nap or pile)	a covering for a floor
a natural object that resembles or suggests a carpet

carpet (verb)	floor cover (verb)
cover with a carpet
cover completely, as if with a carpet
form a carpet-like cover (over)