Sentry vs. Sentinel

Sentrynoun

A guard, particularly on duty at the entrance to a military base.

Sentinelnoun

A sentry or guard.

Sentrynoun

(uncountable) Sentry duty; time spent being a sentry.

Sentinelnoun

(computer science) a unique string of characters recognised by a computer program for processing in a special way; a keyword.

‘The <xmp> tag is a sentinel that suspends web-page processing and displays the subsequent text literally.’;

Sentrynoun

(nautical) A form of drag to be towed underwater, which on striking bottom is upset and rises to the surface.

Sentinelnoun

Watch; guard.

Sentrynoun

A watchtower.

Sentinelnoun

A sentinel crab.

Sentrynoun

A soldier placed on guard; a sentinel.

Sentinelverb

(transitive) To watch over as a guard.

‘He sentineled the north wall.’;

Sentrynoun

Guard; watch, as by a sentinel.

‘Here toils, and death, and death's half-brother, sleep,Forms terrible to view, their sentry keep.’;

Sentinelverb

(transitive) To post as guard.

‘He sentineled him on the north wall.’;

Sentrynoun

a person employed to watch for something to happen

Sentinelverb

(transitive) To post a guard for.

‘He sentineled the north wall with just one man.’;

Sentinelnoun

One who watches or guards; specifically (Mil.), a soldier set to guard an army, camp, or other place, from surprise, to observe the approach of danger, and give notice of it; a sentry.

‘The sentinels who paced the ramparts.’;

Sentinelnoun

Watch; guard.

Sentinelnoun

A marine crab (Podophthalmus vigil) native of the Indian Ocean, remarkable for the great length of its eyestalks; - called also sentinel crab.

Sentinelverb

To watch over like a sentinel.

Sentinelverb

To furnish with a sentinel; to place under the guard of a sentinel or sentinels.

Sentinelnoun

a person employed to watch for something to happen