fancy up vs dress

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

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

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

fancy up: put on special clothes to appear particularly appealing and attractive
dress: put on clothes

Other hypernyms of fancy up include get dressed.

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

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

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

fancy up (noun)	dress (noun)
	a one-piece garment for a woman; has skirt and bodice
	clothing of a distinctive style or for a particular occasion
	clothing in general

fancy up (adjective)	dress (adjective)
	(of an occasion) requiring formal clothes
	suitable for formal occasions

fancy up (verb)	dress (verb)
put on special clothes to appear particularly appealing and attractive	put on clothes
	provide with clothes or put clothes on
	apply a bandage or medication to
	arrange attractively
	dress or groom with elaborate care
	give a neat appearance to
	dress in a certain manner
	kill and prepare for market or consumption
	convert into leather
	put a dressing on
	put a finish on
	cultivate, tend, and cut back the growth of
	provide with decoration
	cut down rough-hewn (lumber) to standard thickness and width
	decorate (food), as with parsley or other ornamental foods
	arrange in ranks