alarm vs horn

alarm and horn both are nouns.

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

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

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

alarm (noun)	horn (noun)
a device that signals the occurrence of some undesirable event	one of the bony outgrowths on the heads of certain ungulates
a clock that wakes a sleeper at some preset time	any hard protuberance from the head of an organism that is similar to or suggestive of a horn
an automatic signal (usually a sound) warning of danger	a brass musical instrument consisting of a conical tube that is coiled into a spiral and played by means of valves
fear resulting from the awareness of danger	a brass musical instrument with a brilliant tone; has a narrow tube and a flared bell and is played by means of valves
	an alarm device that makes a loud warning sound
	a high pommel of a Western saddle (usually metal covered with leather)
	a device on an automobile for making a warning noise
	a noisemaker (as at parties or games) that makes a loud noise when you blow through it
	a device having the shape of a horn
	a noise made by the driver of an automobile to give warning
	the material (mostly keratin) that covers the horns of ungulates and forms hooves and claws and nails

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