ringleader vs firebrand

ringleader and firebrand both are nouns.

Word	Noun	Adjective	Verb	Adverb
ringleader	Yes	No	No	No
firebrand	Yes	No	No	No

As nouns, firebrand is a hypernym of ringleader; that is, firebrand is a word with a broader meaning than ringleader:

Other hypernyms of ringleader include inciter, instigant, instigator, provoker.

ringleader (noun)	firebrand (noun)
a person who leads (especially in illicit activities)	someone who deliberately foments trouble
	a piece of wood that has been burned or is burning