one-liner vs joke

one-liner and joke both are nouns.

Word	Noun	Adjective	Verb	Adverb
one-liner	Yes	No	No	No
joke	Yes	No	Yes	No

As nouns, joke is a hypernym of one-liner; that is, joke is a word with a broader meaning than one-liner:

Other hypernyms of one-liner include gag, jape, jest, laugh.

one-liner (noun)	joke (noun)
a one-line joke	a ludicrous or grotesque act done for fun and amusement
	activity characterized by good humor
	a triviality not to be taken seriously
	a humorous anecdote or remark intended to provoke laughter

one-liner (verb)	joke (verb)
	act in a funny or teasing way
	tell a joke; speak humorously