autochthonal vs indigenous

autochthonal and indigenous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
autochthonal	No	Yes	No	No
indigenous	No	Yes	No	No

As adjectives, autochthonal and indigenous are synonyms defined as:

Other synonyms of autochthonal include autochthonic, autochthonous, endemic.

autochthonal (adjective)	indigenous (adjective)
originating where it is found	originating where it is found