dominatrix vs adult female

dominatrix and adult female both are nouns.

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

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

dominatrix: a dominating woman (especially one who plays that role in a sadomasochistic sexual relationship)
adult female: an adult female person (as opposed to a man)

Other hypernyms of dominatrix include woman.

dominatrix (noun)	adult female (noun)
a dominating woman (especially one who plays that role in a sadomasochistic sexual relationship)	an adult female person (as opposed to a man)