indigenous vs autochthonous

indigenous and autochthonous both are adjectives.

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

As adjectives, indigenous and autochthonous are synonyms defined as:

Other synonyms of indigenous include autochthonal, autochthonic, endemic.

indigenous (adjective)	autochthonous (adjective)
originating where it is found	of rocks, deposits, etc.; found where they and their constituents were formed
	originating where it is found