decoder vs decipherer

decoder and decipherer both are nouns.

Word	Noun	Adjective	Verb	Adverb
decoder	Yes	No	No	No
decipherer	Yes	No	No	No

As nouns, decoder and decipherer are synonyms defined as:

decoder and decipherer: the kind of intellectual who converts messages from a code to plain text

decoder (noun)	decipherer (noun)
a machine that converts a coded text into ordinary language	a reader capable of reading and interpreting illegible or obscure text
the kind of intellectual who converts messages from a code to plain text	the kind of intellectual who converts messages from a code to plain text