appal vs scare

appal is not a noun while scare is a noun.

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

As verbs, scare is a hypernym of appal; that is, scare is a word with a broader meaning than appal:

Other hypernyms of appal include affright, fright, frighten.

appal (noun)	scare (noun)
	a sudden attack of fear
	sudden mass fear and anxiety over anticipated events

appal (verb)	scare (verb)
strike with disgust or revulsion	cause fear in
fill with apprehension or alarm; cause to be unpleasantly surprised	cause to lose courage; to be daunted; to be scared away