scare vs alarm

scare and alarm both are nouns.

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

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

scare (noun)	alarm (noun)
a sudden attack of fear	a device that signals the occurrence of some undesirable event
sudden mass fear and anxiety over anticipated events	a clock that wakes a sleeper at some preset time
	an automatic signal (usually a sound) warning of danger
	fear resulting from the awareness of danger

scare (verb)	alarm (verb)
cause fear in	warn or arouse to a sense of danger or call to a state of preparedness
cause to lose courage; to be daunted; to be scared away	fill with apprehension or alarm; cause to be unpleasantly surprised