As nouns the difference between renegade and marauder
is that renegade is an outlaw or rebel while marauder is someone who moves about in roving fashion looking for plunder.
renegade
English
Noun
(
en noun)
An outlaw or rebel.
A disloyal person who betrays or deserts a cause, religion, political party, friend, etc.
Coordinate terms
* (disloyal person) apostate, defector, heretic, turncoat
marauder
English
Noun
(
en noun)
Someone who moves about in roving fashion looking for plunder.
-
A band of outlaws who raid and pillage.
By extension anything which marauds.