Toad is not a gender, it is a species. Genders are male and female (with various combinations or transformations between male and female also being possible).
Doctor is a neuter gender
Opposite gender of Filipino: Filipina
Clot is not gender specific.
Opposite gender of a Filipino: FILIPINA
There isn't an opposite gender of farmer. A farmer can be either a male or a female.
An emperor is the opposite in gender to an empress.
The opposite gender of giantess is giant.
The opposite gender for Joseph is Josephine.
The opposite of dairymaid is dairyman.
gentlewoman....
granddaughter
viscountess