czarina
A czarina is the wife of a czar.A czarina is not necessarily married. A czarina could rule in her own right.
The masculine gender of czarina is czar.
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
The opposite gender to "negro" is "negra" in Spanish, which translates to "black" and "black woman" respectively.
The opposite gender of boy is girl. Boys are male, while girls are female.
The opposite gender of giantess is giant.
The opposite of dairymaid is dairyman.