blond / blonde
Adjective vs. noun for fair hair.
As an adjective, blond is the correct spelling for anyone: blond hair, a blond man, a blond woman. As a noun, the spelling depends on the person’s sex: a man is a blond, and a woman is a blonde.
Examples
UseShe has blond hair. (the adjective, one spelling for anyone)
UseThe role went to a blonde. (the noun for a woman)
UseThe role went to a blond. (the noun for a man)
AvoidShe has blonde hair. (blonde is only a noun, and the adjective is blond for everyone)
Dictionaries now also list blonde as an adjective for a woman. However, in careful writing, blond is the adjective for everyone, and blonde is reserved for the noun.