rebel vs rise up

rebel is a noun but rise up is not a noun.

Word	Noun	Adjective	Verb	Adverb
rebel	Yes	No	Yes	No
rise up	No	No	Yes	No

As verbs, rebel and rise up are synonyms defined as:

rebel and rise up: take part in a rebellion; renounce a former allegiance

Other synonyms of rebel include arise, rise.

rebel (noun)	rise up (noun)
a person who takes part in an armed rebellion against the constituted authority (especially in the hope of improving conditions)
someone who exhibits great independence in thought and action

rebel (verb)	rise up (verb)
take part in a rebellion; renounce a former allegiance	come to the surface
break with established customs	stand up on the hind legs, of quadrupeds
	take part in a rebellion; renounce a former allegiance