merriment vs jocularity

merriment and jocularity both are nouns.

Word	Noun	Adjective	Verb	Adverb
merriment	Yes	No	No	No
jocularity	Yes	No	No	No

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

Other hyponyms of merriment include glee, gleefulness, hilarity, mirth, mirthfulness, jocundity, jolliness, jollity, joviality.

merriment (noun)	jocularity (noun)
activities that are enjoyable or amusing	activity characterized by good humor
a gay feeling	fun characterized by humor
	a feeling of facetious merriment