Actress
The word "actriz" is feminine in Spanish, meaning "actress." It is used to refer to a female actor. The masculine form of the word is "actor."
The feminine form of someone that acts is generally actress, actor usually refers to the male gender
Actress is (was) the feminine of actor.
The feminine form of ami is amie. The feminine plural is amies.
The feminine form of bajo is baja. The feminine plural is bajas.
The feminine form of alumnus is alumna. The feminine plural is alumnae.
The feminine for actor is actress. Though, nowadays, actor can be a male or female. The use of different genre terms are less used today - in the name of genre equality.
Baroness is the feminine form.
Mistress is the feminine form of master. It is already in feminine form.
Actor & Actress
"Actriz" is a feminine noun. "Actor" is the masculine.
The feminine form of charmant is charmante. The feminine plural is charmantes.