hominian vs hominid

hominian is not a noun while hominid is a noun.

Word	Noun	Adjective	Verb	Adverb
hominian	No	Yes	No	No
hominid	Yes	Yes	No	No

As adjectives, hominian and hominid are synonyms defined as:

hominian and hominid: characterizing the family Hominidae, which includes Homo sapiens as well as extinct species of manlike creatures

hominian (noun)	hominid (noun)
	a primate of the family Hominidae

hominian (adjective)	hominid (adjective)
characterizing the family Hominidae, which includes Homo sapiens as well as extinct species of manlike creatures	characterizing the family Hominidae, which includes Homo sapiens as well as extinct species of manlike creatures