watch, protector, guard, sentinel
Guard or Sentry
watch out, beware, take care, guard, sentry, be alert, be watchful.
The possessive form of the noun sentry is sentry's.Example: After many hours, the sentry's feet were aching.
Sentry (GateKeeper)
sentry
Sentry Group was created in 1930.
Travel Sentry was created in 2003.
Sentry - Kree - was created in 1967.
Earth Sentry was created in 1999.
The plural form of the word "sentry" is "sentries."
Try the link to Sentry.
Contact Sentry or a qualified locksmith.