keenness vs steel trap

keenness and steel trap both are nouns.

Word	Noun	Adjective	Verb	Adverb
keenness	Yes	No	No	No
steel trap	Yes	No	No	No

As nouns, steel trap is a hyponym of keenness; that is, steel trap is a word with a more specific, narrower meaning than keenness:

keenness: a quick and penetrating intelligence
steel trap: an acute intelligence (an analogy based on the well-known sharpness of steel traps)

keenness (noun)	steel trap (noun)
thinness of edge or fineness of point	a trap made of steel with a strong spring and sharp toothlike projections to hold the prey
a quick and penetrating intelligence	an acute intelligence (an analogy based on the well-known sharpness of steel traps)
a positive feeling of wanting to push ahead with something