ontogeny vs ontogenetic

ontogeny is a noun but ontogenetic is not a noun.

Word	Noun	Adjective	Verb	Adverb
ontogeny	Yes	No	No	No
ontogenetic	No	Yes	No	No

ontogeny (noun)	ontogenetic (noun)
(biology) the process of an individual organism growing organically; a purely biological unfolding of events involved in an organism changing gradually from a simple to a more complex level

ontogeny (adjective)	ontogenetic (adjective)
	of or relating to the origin and development of individual organisms