tusk

(noun) a hard smooth ivory colored dentine that makes up most of the tusks of elephants and walruses. Synonyms: ivory.

(noun) a long pointed tooth specialized for fighting or digging; especially in an elephant or walrus or hog.

(verb) stab or pierce with a horn or tusk. Synonyms: horn. Example: "The rhino horned the explorer."

(verb) remove the tusks of animals. Synonyms: detusk. Example: "Tusk an elephant."