tumultuous vs riotous

tumultuous and riotous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
tumultuous	No	Yes	No	No
riotous	No	Yes	No	No

As adjectives, tumultuous and riotous are synonyms defined as:

tumultuous and riotous: characterized by unrest or disorder or insubordination

Other synonyms of tumultuous include disruptive, troubled, turbulent.

tumultuous (adjective)	riotous (adjective)
characterized by unrest or disorder or insubordination	produced or growing in extreme abundance
	unrestrained by convention or morality
	characterized by unrest or disorder or insubordination