select committee vs committee

select committee and committee both are nouns.

Word	Noun	Adjective	Verb	Adverb
select committee	Yes	No	No	No
committee	Yes	No	No	No

As nouns, committee is a hypernym of select committee; that is, committee is a word with a broader meaning than select committee:

select committee: a parliamentary committee appointed for some special purpose
committee: a special group delegated to consider some matter

Other hypernyms of select committee include commission.

select committee (noun)	committee (noun)
a parliamentary committee appointed for some special purpose	a special group delegated to consider some matter
	a self-constituted organization to promote something