signal vs alarm

alarm vs signal

signal and alarm both are nouns.

signal is an adjective but alarm is not an adjective.

signal and alarm both are verbs.

Word	Noun	Adjective	Verb	Adverb
signal	Yes	Yes	Yes	No
alarm	Yes	No	Yes	No

As nouns, alarm is a hyponym of signal; that is, alarm is a word with a more specific, narrower meaning than signal:

signal: any nonverbal action or gesture that encodes a message
alarm: an automatic signal (usually a sound) warning of danger

Other hyponyms of signal include recording, number, phone number, telephone number, start, starting signal, storm signal, beam, radio beam, ticktack, time signal, dog-ear, animal communication, alarum, alert, warning signal, distress call, distress signal, all clear, bugle call, curfew, retreat, drumbeat, radiotelegraphic signal, telegraphic signal, whistle, whistling, high sign, symbol, visual signal, indicator, electronic signal, radio beacon, input, input signal, output, output signal.

signal (noun)	alarm (noun)
any nonverbal action or gesture that encodes a message	a device that signals the occurrence of some undesirable event
any incitement to action	a clock that wakes a sleeper at some preset time
an electric quantity (voltage or current or field strength) whose modulation represents coded information about the source from which it comes	an automatic signal (usually a sound) warning of danger
	fear resulting from the awareness of danger

signal (adjective)	alarm (adjective)
notably out of the ordinary

signal (verb)	alarm (verb)
communicate silently and non-verbally by signals or signs	warn or arouse to a sense of danger or call to a state of preparedness
be a signal for or a symptom of	fill with apprehension or alarm; cause to be unpleasantly surprised

Difference between signal and alarm

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