endogamous vs phytology

endogamous is not a noun while phytology is a noun.

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

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

endogamous (adjective)	phytology (adjective)
pertaining to or characterized by the custom of marrying only within the limits of a clan or tribe
characterized by or fit for fertilization by pollen from another flower of the same kind