jail vs gaol

jail and gaol both are nouns.

Word	Noun	Adjective	Verb	Adverb
jail	Yes	No	Yes	No
gaol	Yes	No	Yes	No

As nouns, jail and gaol are synonyms defined as:

jail and gaol: 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)

Other synonyms of jail include clink, jailhouse, pokey, poky, slammer.

As verbs, jail and gaol are synonyms defined as:

Other synonyms of jail include immure, imprison, incarcerate, jug, lag, put away, put behind bars, remand.

jail (noun)	gaol (noun)
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)	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)

jail (verb)	gaol (verb)
lock up or confine, in or as in a jail	lock up or confine, in or as in a jail