dress up vs preen

dress up and preen both are verbs.

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

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

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

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

dress up (verb)	preen (verb)
put on special clothes to appear particularly appealing and attractive	dress or groom with elaborate care
dress in a costume	pride or congratulate (oneself) for an achievement
dress in a certain manner	clean with one's bill
make something appear superficially attractive
put a caparison on