autotypy vs autotype

autotypy and autotype both are nouns.

Word	Noun	Adjective	Verb	Adverb
autotypy	Yes	No	No	No
autotype	Yes	No	No	No

As nouns, autotypy and autotype are synonyms defined as:

autotypy and autotype: process for producing permanent prints in a carbon pigment

autotypy (noun)	autotype (noun)
process for producing permanent prints in a carbon pigment	an exact copy or reproduction
	process for producing permanent prints in a carbon pigment