attired vs dressed

attired and dressed both are adjectives.

Word	Noun	Adjective	Verb	Adverb
attired	No	Yes	No	No
dressed	No	Yes	No	No

As adjectives, attired and dressed are synonyms defined as:

attired and dressed: dressed or clothed especially in fine attire; often used in combination

Other synonyms of attired include appareled, garbed, garmented, habilimented, robed.

attired (adjective)	dressed (adjective)
dressed or clothed especially in fine attire; often used in combination	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