autacoid vs autocoid

autacoid and autocoid both are nouns.

Word	Noun	Adjective	Verb	Adverb
autacoid	Yes	No	No	No
autocoid	Yes	No	No	No

As nouns, autacoid and autocoid are synonyms defined as:

autacoid and autocoid: any physiologically active internal secretion especially one of uncertain classification

autacoid (noun)	autocoid (noun)
any physiologically active internal secretion especially one of uncertain classification	any physiologically active internal secretion especially one of uncertain classification