What is the feminine of the word sorcerer?

In English there are no masculine or feminine forms. English uses gender specific nouns for a male or a female.

The noun 'wizard' is a common gender noun;, a Word for a male or a female. A wizard is a person who practices magic or conjuring; and a person with amazing skill (a wizard at math).

Some writers of stories (e.g. Harry Potter) use "Wizard" for a male and "Witch" for a female, but this usage is not strictly necessary, both Words are common gender nouns.