smarten up vs slick up

smarten up and slick up both are verbs.

Word	Noun	Adjective	Verb	Adverb
smarten up	No	No	Yes	No
slick up	No	No	Yes	No

As verbs, smarten up and slick up are synonyms defined as:

smarten up and slick up: dress and groom with particular care, as for a special occasion

Other synonyms of smarten up include spruce, spruce up.

As verbs, smarten up and slick up are synonyms defined as:

Other synonyms of smarten up include spiff up, spruce, spruce up, titivate, tittivate.

smarten up (verb)	slick up (verb)
dress and groom with particular care, as for a special occasion	dress and groom with particular care, as for a special occasion
make neat, smart, or trim	make neat, smart, or trim