annual vs phytology

annual and phytology both are nouns.

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

annual (noun)	phytology (noun)
a reference book that is published regularly once every year	the branch of biology that studies plants
(botany) a plant that completes its entire life cycle within the space of a year

annual (adjective)	phytology (adjective)
completing its life cycle within a year
occurring or payable every year