mediatrix vs intermediary

mediatrix and intermediary both are nouns.

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

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

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

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