Many words can have two forms, one for each gender. For example, when a French masculine word ends in ‑uel, its feminine form is ‑uelle.
C’est ma recette habituelle.
It is my usual recipe.
J’aime cette conversation spirituelle.
I love this spiritual conversation.
C’est une compétition individuelle.
It is an individual competition.
When a masculine French word ends in ‑ier, its feminine form will be ‑ière.
Il a mangé la pomme entière.
He ate the whole apple.
C’est une action ouvrière.
It’s a workers’ action.