acuteness vs steel trap

acuteness and steel trap both are nouns.

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

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

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

acuteness (noun)	steel trap (noun)
the quality of having a sharp edge or 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 sensitivity that is keen and highly developed