scare vs scare off

scare is a noun but scare off is not a noun.

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

As verbs, scare and scare off are synonyms defined as:

scare and scare off: cause to lose courage; to be daunted; to be scared away

Other synonyms of scare include dash, daunt, frighten away, frighten off, pall, scare away.

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

scare (verb)	scare off (verb)
cause fear in	cause to lose courage; to be daunted; to be scared away
cause to lose courage; to be daunted; to be scared away