Synonyms of the word

alarum

• n. (archaic) A danger signal or warning.
• n. A call to arms.
• v. (archaic) To sound alarums, to sound an alarm.

alarm

• n. A summons to arms, as on the approach of an enemy.
• n. Any sound or information intended to give notice of approaching danger; a warning sound to arouse attention;…
• n. A sudden attack; disturbance.
• n. Sudden surprise with fear or terror excited by apprehension of danger; in the military use, commonly,…
• n. A mechanical device for awaking people, or rousing their attention.
• n. An instance of an alarm ringing, beeping or clanging, to give a noise signal at a certain time.
• v. (transitive) To call to arms for defense.
• v. (transitive) To give (someone) notice of approaching danger.
• v. (transitive) To rouse to vigilance and action; to put on the alert.
• v. (transitive) To surprise with apprehension of danger; to fill with anxiety in regard to threatening evil;…
• v. (transitive) To keep in excitement; to disturb.

alert

• adj. Attentive; awake; on guard.
• adj. (obsolete) Brisk; nimble; moving with celerity.
• n. An alarm.
• n. A notification of higher importance than an advisory.
• v. To give warning to.

sign

• n. (sometimes also used uncountably) A visible indication.
• n. A clearly visible object, generally flat, bearing a short message in words or pictures.
• n. (astrology) An astrological sign.
• n. (mathematics) Positive or negative polarity. (Note: it is improper to place a sign on the number zero).
• n. A specific gesture or motion used to communicate by those with speaking or hearing difficulties; now specifically,…
• n. (uncountable) Sign language in general.
• n. An omen.
• n. (medicine) A property of the body that indicates a disease and, unlike a symptom, is unlikely to be noticed…
• n. A military emblem carried on a banner or standard.
• v. To make a mark.
• v. To make the sign of the cross.
• v. To indicate.

signal

• n. A sign made to give notice of some occurrence, command, or danger, or to indicate the start of a concerted…
• n. An on-off light, semaphore, or other device used to give an indication to another person.
• n. (of a radio, TV, telephone, internet, etc.) An electrical or electromagnetic action, normally a voltage…
• n. A token; an indication; a foreshadowing; a sign.
• n. Useful information, as opposed to noise.
• n. (computing, Unix) A simple interprocess communication used to notify a process or thread of an occurrence.
• v. (transitive, intransitive) To indicate.
• adj. Standing above others in rank, importance, or achievement.

signaling

• v. present participle of signal.
• n. (usually biochemistry) The sending of a biochemical or other type of signal.