muster up vs collect

muster up is not a noun while collect is a noun.

Word	Noun	Adjective	Verb	Adverb
muster up	No	No	Yes	No
collect	Yes	Yes	Yes	Yes

As verbs, collect is a hypernym of muster up; that is, collect is a word with a broader meaning than muster up:

Other hypernyms of muster up include garner, gather, pull together.

muster up (noun)	collect (noun)
	a short prayer generally preceding the lesson in the Church of Rome or the Church of England

muster up (adjective)	collect (adjective)
	payable by the recipient on delivery

muster up (verb)	collect (verb)
gather or bring together	assemble or get together
	get or bring together
	get or gather together
	call for and obtain payment of
	gather or collect

muster up (adverb)	collect (adverb)
	make a telephone call or mail a package so that the recipient pays