rebuker vs reproacher

rebuker and reproacher both are nouns.

Word	Noun	Adjective	Verb	Adverb
rebuker	Yes	No	No	No
reproacher	Yes	No	No	No

As nouns, rebuker and reproacher are synonyms defined as:

Other synonyms of rebuker include reprover, upbraider.

rebuker (noun)	reproacher (noun)
someone who finds fault or imputes blame	someone who finds fault or imputes blame