also gaoler, late 14c., from Old North French gayolierre, Old French jaioleur (Modern French geôlier), agent noun from jaole/geole (see jail (n.)). Jail-keeper is attested from 1620s.
jai alai
jail
jail-bait
jail-bird
jail-break
jailer
jail-house
Jain
Jainism
Jake
jakes