estivation vs phytology

estivation and phytology both are nouns.

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

estivation (noun)	phytology (noun)
(botany) the arrangement of sepals and petals in a flower bud before it opens	the branch of biology that studies plants
(zoology) cessation or slowing of activity during the summer; especially slowing of metabolism in some animals during a hot or dry period