stemmed vs phytology

stemmed is not a noun while phytology is a noun.

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

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

stemmed (adjective)	phytology (adjective)
having a stem or stems or having a stem as specified; often used in combination
(of plants) producing a well-developed stem above ground
having the stem removed