throw rug vs rug

throw rug and rug both are nouns.

Word	Noun	Adjective	Verb	Adverb
throw rug	Yes	No	No	No
rug	Yes	No	No	No

As nouns, rug is a hypernym of throw rug; that is, rug is a word with a broader meaning than throw rug:

throw rug: a small rug; several can be used in a room
rug: floor covering consisting of a piece of thick heavy fabric (usually with nap or pile)

Other hypernyms of throw rug include carpet, carpeting.

throw rug (noun)	rug (noun)
a small rug; several can be used in a room	floor covering consisting of a piece of thick heavy fabric (usually with nap or pile)