feminine vs unstressed

feminine is a noun but unstressed is not a noun.

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

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

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