A person detailed to watch; sentry
Acuteness of vision or perception; keenness.
A legal investigative process entailing a close observing or listening to a person in effort to gather evidentiary information about the commission of a crime, or lesser improper behavior (as with surveillance of wayward spouse in domestic relations proceedings). Wiretapping, eavesdropping, shadowing, tailing, and electronic observation are all examples of this law-enforcement technique.
(Nautical) A group of sailors and officers aboard a ship or shore station with a common period of duty: starboard watch, port watch.
Wariness is defined as the state of being cautious.
Indiscretion is defined as lack of good judgment with what you say or do.
An instance of such failure, carelessness, or indifference
Find another word for vigilance. In this page you can discover 19 synonyms, antonyms, idiomatic expressions, and related words for vigilance, like: alertness, watchfulness, carelessness, lookout, acuity, attention, diligence, indiscretion, negligence, impulsiveness and surveillance.