She is the faithiest person I know.

She has a faithy personality.

The Bahá'í Faith is a monotheistic religion that emphasizes the spiritual unity of all humankind.

Many people seek the help of faith healers for their ailments.

Her last name is Faithfull.

The Baha'i Faith is a religion that emphasizes the spiritual unity of all humankind.

La flèche faîtière est un élément architectural traditionnellement utilisé sur les toits de certaines maisons.

She is the faithfulest friend I have ever had.

She is the faithfullest friend I have ever had.

Taking leaps of faith can lead to great opportunities.