Words similar to alert

Example sentences for: alert

How can you use “alert” in a sentence? Here are some example sentences to help you improve your vocabulary:

2) The president hatches a plan to help the hostages escape, but he needs to alert the Air Force to his scheme.
One wants to be helpful and alert the person, but it is a very difficult thing to do.
Gear Alert
Terrorism Alert, July 3, 2001.