neat vs smashing

neat is not a noun while smashing is a noun.

Word	Noun	Adjective	Verb	Adverb
neat	No	Yes	No	No
smashing	Yes	Yes	No	No

As adjectives, neat and smashing are synonyms defined as:

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

neat (noun)	smashing (noun)
	the act of breaking something into small pieces

neat (adjective)	smashing (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