mediatrix vs mediator

mediatrix and mediator both are nouns.

Word	Noun	Adjective	Verb	Adverb
mediatrix	Yes	No	No	No
mediator	Yes	No	No	No

As nouns, mediator is a hypernym of mediatrix; that is, mediator is a word with a broader meaning than mediatrix:

Other hypernyms of mediatrix include go-between, intercessor, intermediary, intermediator.

mediatrix (noun)	mediator (noun)
a woman who is a mediator	a negotiator who acts as a link between parties