dandy vs smashing

dandy and smashing both are nouns.

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

As adjectives, dandy and smashing are synonyms defined as:

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

dandy (noun)	smashing (noun)
a sailing vessel with two masts; a small mizzen is aft of the rudderpost	the act of breaking something into small pieces
a man who is much concerned with his dress and appearance

dandy (adjective)	smashing (adjective)
excellent	excellent