pettiness vs joke

pettiness and joke both are nouns.

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

As nouns, joke is a hyponym of pettiness; that is, joke is a word with a more specific, narrower meaning than pettiness:

Other hyponyms of pettiness include unproblematicalness.

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

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