protest vs rebel

protest and rebel both are nouns.

Word	Noun	Adjective	Verb	Adverb
protest	Yes	No	Yes	No
rebel	Yes	No	Yes	No

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

Other hyponyms of protest include strike, walk out, demonstrate, march, arise, rise, rise up, renegade.

protest (noun)	rebel (noun)
the act of protesting; a public (often organized) manifestation of dissent	a person who takes part in an armed rebellion against the constituted authority (especially in the hope of improving conditions)
a formal and solemn declaration of objection	someone who exhibits great independence in thought and action
the act of making a strong public expression of disagreement and disapproval

protest (verb)	rebel (verb)
utter words of protest	take part in a rebellion; renounce a former allegiance
affirm or avow formally or solemnly	break with established customs
express opposition through action or words