redneck vs cracker

redneck and cracker both are nouns.

Word	Noun	Adjective	Verb	Adverb
redneck	Yes	No	No	No
cracker	Yes	No	No	No

As nouns, redneck and cracker are synonyms defined as:

redneck (noun)	cracker (noun)
a poor White person in the southern United States	a party favor consisting of a paper roll (usually containing candy or a small favor) that pops when pulled at both ends
	firework consisting of a small explosive charge and fuse in a heavy paper casing
	a thin crisp wafer made of flour and water with or without leavening and shortening; unsweetened or semisweet
	a poor White person in the southern United States
	a programmer who cracks (gains unauthorized access to) computers, typically to do malicious things