alarm vs consternation

alarm and consternation both are nouns.

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

As nouns, alarm and consternation are synonyms defined as:

Other synonyms of alarm include dismay.

alarm (noun)	consternation (noun)
a device that signals the occurrence of some undesirable event	fear resulting from the awareness of danger
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

alarm (verb)	consternation (verb)
warn or arouse to a sense of danger or call to a state of preparedness
fill with apprehension or alarm; cause to be unpleasantly surprised