groom vs clean up

groom is a noun but clean up is not a noun.

Word	Noun	Adjective	Verb	Adverb
groom	Yes	No	Yes	No
clean up	No	No	Yes	No

As verbs, clean up is a hyponym of groom; that is, clean up is a word with a more specific, narrower meaning than groom:

groom (noun)	clean up (noun)
a man who has recently been married
someone employed in a stable to take care of the horses
a man participant in his own marriage ceremony

groom (verb)	clean up (verb)
care for one's external appearance	make oneself clean, presentable or neat
give a neat appearance to	put (things or places) in order
educate for a future role or function	finish attending to
	make a big profit; often in a short period of time