joke vs pettiness

joke and pettiness both are nouns.

Word	Noun	Adjective	Verb	Adverb
joke	Yes	No	Yes	No
pettiness	Yes	No	No	No

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

Other hypernyms of joke include puniness, slightness, triviality.

joke (noun)	pettiness (noun)
a ludicrous or grotesque act done for fun and amusement	the quality of being unimportant and petty or frivolous
activity characterized by good humor	lack of generosity in trifling matters
a triviality not to be taken seriously	narrowness of mind or ideas or views
a humorous anecdote or remark intended to provoke laughter

joke (verb)	pettiness (verb)
act in a funny or teasing way
tell a joke; speak humorously