fancy up vs plume

fancy up is not a noun while plume is a noun.

Word	Noun	Adjective	Verb	Adverb
fancy up	No	No	Yes	No
plume	Yes	No	Yes	No

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

fancy up: put on special clothes to appear particularly appealing and attractive
plume: dress or groom with elaborate care

Other hyponyms of fancy up include dress, preen, primp, prank, tart up, enrobe, bedizen, dizen.

fancy up (noun)	plume (noun)
	the light horny waterproof structure forming the external covering of birds
	a feather or cluster of feathers worn as an ornament
	anything that resembles a feather in shape or lightness

fancy up (verb)	plume (verb)
put on special clothes to appear particularly appealing and attractive	dress or groom with elaborate care
	form a plume
	clean with one's bill
	deck with a plume
	be proud of
	rip off; ask an unreasonable price