autophytic vs phytology

autophytic is not a noun while phytology is a noun.

Word	Noun	Adjective	Verb	Adverb
autophytic	No	Yes	No	No
phytology	Yes	No	No	No

autophytic (noun)	phytology (noun)
	the branch of biology that studies plants

autophytic (adjective)	phytology (adjective)
of or relating to organisms (as green plants) that can make complex organic nutritive compounds from simple inorganic sources by photosynthesis