spiffed up vs dressed to the nines

spiffed up and dressed to the nines both are adjectives.

Word	Noun	Adjective	Verb	Adverb
spiffed up	No	Yes	No	No
dressed to the nines	No	Yes	No	No

As adjectives, spiffed up and dressed to the nines are synonyms defined as:

spiffed up and dressed to the nines: dressed in fancy or formal clothing

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

spiffed up (adjective)	dressed to the nines (adjective)
dressed in fancy or formal clothing	dressed in fancy or formal clothing