Guard

Person or thing that protects someone or something.

protector warden sentry

A guard is a person or thing that protects someone or something. It can also refer to a defensive player in certain sports.

/ɡɑːrd/

From Old English *gārd*, from Germanic *gardaz* 'enclosure, protection'.

defender safeguard protection

protector security personnel

bouncer lifeguard prison guard goalie

security system team organization

occupation social role