rooter

noun

One who roots for the success of his patron or his side; specifically, in base-ball and other outdoor contests, one who gives aid and encouragement to his side by applause and by shouting advice.

noun

One who or that which roots or roots up, or tears up by the roots; one who eradicates or destroys.

noun

A plant (or, figuratively, some other thing, or a person) which takes root.

noun

One who, or that which, roots; one that tears up by the roots.

noun

One who roots, or applauds.

noun

One who, or that which, roots; one that tears up by the roots.

noun

an enthusiastic devotee of sports