WordNet sense 1 (a correctional institution used to detain persons who are in the lawful custody of the government (either accused persons awaiting trial or convicted persons serving a sentence)):

clink, pokey, poky, slammer, gaol, jailhouse

WordNet sense 2 (lock up or confine, in or as in a jail):

immure, imprison, incarcerate, jug, lag, remand, put away, put behind bars