phytology vs unsubdivided

phytology is a noun but unsubdivided is not a noun.

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

phytology (noun)	unsubdivided (noun)
the branch of biology that studies plants

phytology (adjective)	unsubdivided (adjective)
	(botany) of leaf shapes; of leaves having no divisions or subdivisions