sport vs jackknife

sport and jackknife both are nouns.

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

sport (noun)	jackknife (noun)
an active diversion requiring physical exertion and competition	a dive in which the diver bends to touch the ankles before straightening out
the occupation of athletes who compete for pay	a large knife with one or more folding blades
verbal wit or mockery (often at another's expense but not to be taken seriously)
someone who engages in sports
(biology) an organism that has characteristics resulting from chromosomal alteration
a person known for the way she (or he) behaves when teased or defeated or subjected to trying circumstances
(Maine colloquial) a temporary summer resident of Maine

sport (verb)	jackknife (verb)
play boisterously	dive into the water bending the body at the waist at a right angle, like a jackknife
wear or display in an ostentatious or proud manner