bushwhacker vs hillbilly

bushwhacker and hillbilly both are nouns.

Word	Noun	Adjective	Verb	Adverb
bushwhacker	Yes	No	No	No
hillbilly	Yes	No	No	No

As nouns, bushwhacker and hillbilly are synonyms defined as:

bushwhacker and hillbilly: a disparaging term for an unsophisticated person

bushwhacker (noun)	hillbilly (noun)
a disparaging term for an unsophisticated person	a disparaging term for an unsophisticated person
a Confederate guerrilla during the American Civil War