repeater

(noun) a person who repeats. Example: "The audience consisted largely of repeaters who had seen the movie many times."

(noun) someone who is repeatedly arrested for criminal behavior (especially for the same criminal behavior). Synonyms: recidivist, habitual criminal.

(noun) a firearm that can fire several rounds without reloading. Synonyms: repeating firearm.

(noun) (electronics) electronic device that amplifies a signal before transmitting it again. Example: "Repeaters can be used in computer networks to extend cabling distances."