indigenous vs autochthonal

indigenous and autochthonal both are adjectives.

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

As adjectives, indigenous and autochthonal are synonyms defined as:

Other synonyms of indigenous include autochthonic, autochthonous, endemic.

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