The word "young" does not imply gender, either male or female.
The opposite gender of a filly (young female horse) is a colt (young male).MareMaybe the opposite of filly is colt (a young male horse).
The opposite gender for squaws is braves. Squaws was the name given to Indian maidens. Braves were young Indian men.
There is no exact opposite gender for a heifer. A heifer is a young female that has not yet born a calf. Males that have not been castrated are bulls; males that have been castrated are steers.
Doctor is a neuter gender
Opposite gender of Filipino: Filipina
Young boys in the wedding party are referred to as "ring bearers."
Clot is not gender specific.
Opposite gender of a Filipino: FILIPINA
The opposite gender of farmer is farmeress or farmwife.
The opposite gender of fraternity is sorority.
An emperor is the opposite in gender to an empress.
The opposite gender of giantess is giant.