phytology vs self-pollinating

phytology is a noun but self-pollinating is not a noun.

Word	Noun	Adjective	Verb	Adverb
phytology	Yes	No	No	No
self-pollinating	No	Yes	No	No

phytology (noun)	self-pollinating (noun)
the branch of biology that studies plants

phytology (adjective)	self-pollinating (adjective)
	of or relating to or characteristic of self-pollination