"gaol" in the noun sense
1. jail, jailhouse, gaol, clink, slammer, poky, pokey
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)
"gaol" in the verb sense
1. imprison, incarcerate, lag, immure, put behind bars, jail, jug, gaol, put away, remand
lock up or confine, in or as in a jail
"The suspects were imprisoned without trial"
"the murderer was incarcerated for the rest of his life"
Source: WordNet® (An amazing lexical database of English)
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