dressed to kill vs dressed

dressed to kill and dressed both are adjectives.

Word	Noun	Adjective	Verb	Adverb
dressed to kill	No	Yes	No	No
dressed	No	Yes	No	No

As adjectives, dressed to kill and dressed are synonyms defined as:

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

dressed to kill (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