artiodactylous vs artiodactyl

artiodactylous is not a noun while artiodactyl is a noun.

Word	Noun	Adjective	Verb	Adverb
artiodactylous	No	Yes	No	No
artiodactyl	Yes	Yes	No	No

As adjectives, artiodactylous and artiodactyl are synonyms defined as:

artiodactylous and artiodactyl: of or relating to or belonging to mammals of the order Artiodactyla

Other synonyms of artiodactylous include even-toed.

artiodactylous (noun)	artiodactyl (noun)
	placental mammal having hooves with an even number of functional toes on each foot

artiodactylous (adjective)	artiodactyl (adjective)
of or relating to or belonging to mammals of the order Artiodactyla	of or relating to or belonging to mammals of the order Artiodactyla