Executrix.
Generally speaking, words of Latin origin that denote a masculine actor and end in '-or' can be transformed into the feminine with the ending '-rix.'
Examples:
testator --> testatrix
dominator --> dominatrix
Executrix...
Doctor is a neuter gender
Clot is not gender specific.
An emperor is the opposite in gender to an empress.
Opposite gender of Filipino: Filipina
The opposite gender of fraternity is sorority.
The opposite gender of giantess is giant.
Opposite gender to negro is-- NEGRESS
The opposite gender is girl.
The opposite of dairymaid is dairyman.
A Printe is the opposite gender of Printecess
Cock's opposite gender is hen.