scare vs frighten away

scare is a noun but frighten away is not a noun.

Word	Noun	Adjective	Verb	Adverb
scare	Yes	No	Yes	No
frighten away	No	No	Yes	No

As verbs, scare and frighten away are synonyms defined as:

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

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

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

scare (verb)	frighten away (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