not bad vs neat

not bad and neat both are adjectives.

Word	Noun	Adjective	Verb	Adverb
not bad	No	Yes	No	No
neat	No	Yes	No	No

As adjectives, not bad and neat are synonyms defined as:

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

not bad (adjective)	neat (adjective)
excellent	free from clumsiness; precisely or deftly executed
	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