rocker

(noun) an attendant who rocks a child in a cradle.

(noun) a performer or composer or fan of rock music. Synonyms: rock 'n' roll musician.

(noun) a teenager or young adult in the 1960s who wore leather jackets and rode motorcycles.

(noun) a chair mounted on rockers. Synonyms: rocking chair.

(noun) a trough that can be rocked back and forth; used by gold miners to shake auriferous earth in water in order to separate the gold. Synonyms: cradle.

(noun) an ice skate with a curved blade.

(noun) a curved support that permits the supported object to rock to and fro.