keenly vs keen

keenly is not a noun while keen is a noun.

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

keenly (noun)	keen (noun)
	a funeral lament sung with loud wailing

keenly (adjective)	keen (adjective)
	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

keenly (verb)	keen (verb)
	express grief verbally

keenly (adverb)	keen (adverb)
in a keen or penetrating way