dissenter vs objector

dissenter and objector both are nouns.

Word	Noun	Adjective	Verb	Adverb
dissenter	Yes	No	No	No
objector	Yes	No	No	No

As nouns, dissenter and objector are synonyms defined as:

dissenter and objector: a person who dissents from some established policy

Other synonyms of dissenter include contestant, dissident, protester.

dissenter (noun)	objector (noun)
a person who dissents from some established policy	a person who dissents from some established policy