dressed-up vs dressed

dressed-up and dressed both are adjectives.

Word	Noun	Adjective	Verb	Adverb
dressed-up	No	Yes	No	No
dressed	No	Yes	No	No

As adjectives, dressed-up and dressed are synonyms defined as:

Other synonyms of dressed-up include dolled up, dressed to kill, dressed to the nines, spiffed up, spruced up, togged up.

dressed-up (adjective)	dressed (adjective)
dressed in fancy or formal clothing	dressed or clothed especially in fine attire; often used in combination
	(of lumber or stone) to trim and smooth
	treated with medications and protective covering
	dressed in fancy or formal clothing