Synonyms for Bop (same or very similar meaning)
WordNet sense 1 (the law enforcement agency of the Justice Department that operates a nationwide system of prisons and detention facilities to incarcerate inmates sentenced to imprisonment for federal crimes):
Federal Bureau of Prisons
WordNet sense 2 (an early form of modern jazz (originating around 1940)):
bebop
WordNet sense 3 (hit hard):
bash, sock, bonk, whap, whop
From the ODE community, based on WordNet
add/edit