rioter vs trouble maker

rioter and trouble maker both are nouns.

Word	Noun	Adjective	Verb	Adverb
rioter	Yes	No	No	No
trouble maker	Yes	No	No	No

As nouns, trouble maker is a hypernym of rioter; that is, trouble maker is a word with a broader meaning than rioter:

rioter: troublemaker who participates in a violent disturbance of the peace; someone who rises up against the constituted authority
trouble maker: someone who deliberately stirs up trouble

Other hypernyms of rioter include bad hat, mischief-maker, troublemaker, troubler.

rioter (noun)	trouble maker (noun)
troublemaker who participates in a violent disturbance of the peace; someone who rises up against the constituted authority	someone who deliberately stirs up trouble