peachy vs slap-up

peachy and slap-up both are adjectives.

Word	Noun	Adjective	Verb	Adverb
peachy	No	Yes	No	No
slap-up	No	Yes	No	No

As adjectives, peachy and slap-up are synonyms defined as:

Other synonyms of peachy include bang-up, bully, corking, cracking, dandy, great, groovy, keen, neat, nifty, not bad, old, smashing, swell.

peachy (adjective)	slap-up (adjective)
of something resembling a peach in color	excellent
excellent