The word "sentinel" is correct and usable in written English.
You can use it as a noun to refer to a person or thing that watches over or stands as a guard at a place. For example, "The sentinel stood guard at the entrance to the castle."
There are worse places to be watching cricket in the spring than Worcester where every four years, as a traditional prelude to another Ashes summer, the cathedral stood sombre sentinel as Don flowed as serenely as does the Severn.
The schools were built willingly by peasant hands, and outside them over the years thousands of wind-tanned and rosy-cheeked pupils—his children, as he thought of them lined up in the sunshine, smiling, as the great mountains stood sentinel behind.
He argues that malaria and similar diseases need to be monitored like the weather, with what he calls "sentinel surveillance networks" throughout the developing world.
But in Australia, the queens of a bee called Exoneura robusta frequently do the job themselves, standing sentinel at the entrances of their nests, inspecting whoever comes and goes.
STANDING sentinel over one of Myanmar's main border crossings to China, in the town of Mongla, is a lurid pink building, the Drug Eradication Museum.
Most members of a group are relatives, and group members know one another well.The myth has therefore grown up that meerkat sentinel behaviour is a good example of altruism at work.
The Milwaukee Journal-Sentinel reports:Republicans removed appropriations from the bill to get around the requirement that 20 senators vote on the measure.
Talese began his career while in high school in the 1940s as a reporter for the Ocean City Sentinel-Ledger in New Jersey and, after graduating from college, was hired as a copyboy by The New York Times.
North, Middle, and South Andaman, known collectively as Great Andaman, are the main islands; others include Landfall Island, Interview Island, the Sentinel Islands, Ritchie's Archipelago, and Rutland Island.
Does either party have a Bill Clinton waiting in the wings?Update: Russ Feingold, a liberal Democratic Senator from Wisconsin, will not run for President in 2008, the Milwaukee Journal-Sentinel reported.
Some people, such as those on North Sentinel Island in the Andaman Sea, still do.
