autotrophic vs phytology

autotrophic is not a noun while phytology is a noun.

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

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

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