keen vs smashing

keen and smashing both are nouns.

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

As adjectives, keen and smashing are synonyms defined as:

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

keen (noun)	smashing (noun)
a funeral lament sung with loud wailing	the act of breaking something into small pieces

keen (adjective)	smashing (adjective)
excellent	excellent
intense or sharp
having or demonstrating ability to recognize or draw fine distinctions
having a sharp cutting edge or point
painful as if caused by a sharp instrument

keen (verb)	smashing (verb)
express grief verbally