jackknife vs dive

jackknife and dive both are nouns.

Word	Noun	Adjective	Verb	Adverb
jackknife	Yes	No	Yes	No
dive	Yes	No	Yes	No

As nouns, dive is a hypernym of jackknife; that is, dive is a word with a broader meaning than jackknife:

jackknife: a dive in which the diver bends to touch the ankles before straightening out
dive: a headlong plunge into water

Other hypernyms of jackknife include diving.

As verbs, dive is a hypernym of jackknife; that is, dive is a word with a broader meaning than jackknife:

jackknife: dive into the water bending the body at the waist at a right angle, like a jackknife
dive: plunge into water

jackknife (noun)	dive (noun)
a dive in which the diver bends to touch the ankles before straightening out	a steep nose-down descent by an aircraft
a large knife with one or more folding blades	a headlong plunge into water
	a cheap disreputable nightclub or dance hall

jackknife (verb)	dive (verb)
dive into the water bending the body at the waist at a right angle, like a jackknife	drop steeply
	swim under water
	plunge into water