dormancy vs estivation

dormancy and estivation both are nouns.

Word	Noun	Adjective	Verb	Adverb
dormancy	Yes	No	No	No
estivation	Yes	No	No	No

As nouns, estivation is a hyponym of dormancy; that is, estivation is a word with a more specific, narrower meaning than dormancy:

dormancy: a state of quiet (but possibly temporary) inaction
estivation: (zoology) cessation or slowing of activity during the summer; especially slowing of metabolism in some animals during a hot or dry period

Other hyponyms of dormancy include hibernation, aestivation, slumber.

dormancy (noun)	estivation (noun)
quiet and inactive restfulness	(botany) the arrangement of sepals and petals in a flower bud before it opens
a state of quiet (but possibly temporary) inaction	(zoology) cessation or slowing of activity during the summer; especially slowing of metabolism in some animals during a hot or dry period