matronly vs feminine

matronly is not a noun while feminine is a noun.

Word	Noun	Adjective	Verb	Adverb
matronly	No	Yes	No	No
feminine	Yes	Yes	No	No

matronly (noun)	feminine (noun)
	a gender that refers chiefly (but not exclusively) to females or to objects classified as female

matronly (adjective)	feminine (adjective)
befitting or characteristic of a fully mature woman	associated with women and not with men
	female (of grammatical gender)
	befitting or characteristic of a woman especially a mature woman
	(music or poetry) ending on an unaccented beat or syllable