revel vs riot

revel and riot both are nouns.

Word	Noun	Adjective	Verb	Adverb
revel	Yes	No	Yes	No
riot	Yes	No	Yes	No

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

As verbs, riot is a hyponym of revel; that is, riot is a word with a more specific, narrower meaning than revel:

revel: celebrate noisily, often indulging in drinking; engage in uproarious festivities
riot: engage in boisterous, drunken merrymaking

Other hyponyms of revel include carouse, roister.

revel (noun)	riot (noun)
unrestrained merrymaking	a public act of violence by an unruly mob
	a wild gathering involving excessive drinking and promiscuity
	a joke that seems extremely funny
	a state of disorder involving group violence

revel (verb)	riot (verb)
take delight in	take part in a riot; disturb the public peace by engaging in a riot
celebrate noisily, often indulging in drinking; engage in uproarious festivities	engage in boisterous, drunken merrymaking