autotroph vs autotrophic

autotroph is a noun but autotrophic is not a noun.

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

autotroph (noun)	autotrophic (noun)
plant capable of synthesizing its own food from simple organic substances

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