rocker

noun

1.
an attendant who rocks a child in a cradle
Derived from:
rock
2.
a performer or composer or fan of rock music
3.
a teenager or young adult in the 1960s who wore leather jackets and rode motorcycles
4.
a chair mounted on rockers
Derived from:
rock
5.
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
6.
an ice skate with a curved blade
7.
a curved support that permits the supported object to rock to and fro
Derived from:
rock