cytogeny vs ontogenesis

cytogeny and ontogenesis both are nouns.

Word	Noun	Adjective	Verb	Adverb
cytogeny	Yes	No	No	No
ontogenesis	Yes	No	No	No

As nouns, ontogenesis is a hypernym of cytogeny; that is, ontogenesis is a word with a broader meaning than cytogeny:

cytogeny: the origin and development and variation of cells
ontogenesis: (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

Other hypernyms of cytogeny include development, growing, growth, maturation, ontogeny.

cytogeny (noun)	ontogenesis (noun)
the origin and development and variation of cells	(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