stabbing vs keen

stabbing is not a noun while keen is a noun.

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

As adjectives, stabbing and keen are synonyms defined as:

Other synonyms of stabbing include cutting, knifelike, lancinate, lancinating, piercing.

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

stabbing (adjective)	keen (adjective)
causing physical or especially psychological injury	excellent
painful as if caused by a sharp instrument	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

stabbing (verb)	keen (verb)
	express grief verbally