alarm
Definitions
An anxious awareness of danger; fear.
A warning sound or signal, such as a bell or siren, used to alert people to danger.
A device that sounds a signal to wake someone or warn of an intrusion.
Examples
The loud alarm woke me up early this morning.
The sudden noise caused a great deal of alarm among the residents.
Synonyms
Antonyms
calm composure serenity tranquility assurance confidence peace