One who, or that which, bolsters.
A loyal supporter or devoted admirer of a person or institution.
A person, such as a monk or nun, who lives a religious life according to vows they have made.
A devout or zealous worshipper.
A devotee of a particular religion or cult.
Someone who is devoted to a particular pursuit etc.
Consecrated by a vow or promise; consequent on a vow; devoted; promised.