leafing vs ontogeny

leafing and ontogeny both are nouns.

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

As nouns, ontogeny is a hypernym of leafing; that is, ontogeny is a word with a broader meaning than leafing:

leafing: (botany) the process of forming leaves
ontogeny: (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 leafing include development, growing, growth, maturation, ontogenesis.

leafing (noun)	ontogeny (noun)
(botany) the process of forming leaves	(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