schoolmaster
School master
The opposite gender of a schoolmaster could be a schoolmistress or might be a headmistress. The headmistress of a school would be similar to the schoolmaster.
postwoman
Doctor is a neuter gender
Clot is not gender specific.
The opposite gender of fraternity is sorority.
An emperor is the opposite in gender to an empress.
Opposite gender of Filipino: Filipina
Opposite gender to negro is-- NEGRESS
The opposite gender is girl.
The opposite gender of giantess is giant.
The opposite of dairymaid is dairyman.
Parrot