prayer mat vs carpet

prayer mat and carpet both are nouns.

Word	Noun	Adjective	Verb	Adverb
prayer mat	Yes	No	No	No
carpet	Yes	No	Yes	No

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

prayer mat: a small rug used by Muslims during their devotions
carpet: floor covering consisting of a piece of thick heavy fabric (usually with nap or pile)

Other hypernyms of prayer mat include carpeting, rug.

prayer mat (noun)	carpet (noun)
a small rug used by Muslims during their devotions	floor covering consisting of a piece of thick heavy fabric (usually with nap or pile)
	a natural object that resembles or suggests a carpet

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