inamorata vs adult female

inamorata and adult female both are nouns.

Word	Noun	Adjective	Verb	Adverb
inamorata	Yes	No	No	No
adult female	Yes	No	No	No

As nouns, adult female is a hypernym of inamorata; that is, adult female is a word with a broader meaning than inamorata:

inamorata: a woman with whom you are in love or have an intimate relationship
adult female: an adult female person (as opposed to a man)

Other hypernyms of inamorata include lover, woman.

inamorata (noun)	adult female (noun)
a woman with whom you are in love or have an intimate relationship	an adult female person (as opposed to a man)