neat vs bang-up

neat and bang-up both are adjectives.

Word	Noun	Adjective	Verb	Adverb
neat	No	Yes	No	No
bang-up	No	Yes	No	No

As adjectives, neat and bang-up are synonyms defined as:

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

neat (adjective)	bang-up (adjective)
free from clumsiness; precisely or deftly executed	excellent
excellent
superficially impressive, but lacking depth and attention to the true complexities of a subject
clean or organized
(of an alcoholic drink) without water
showing care in execution