frighten away vs scare away

frighten away and scare away both are verbs.

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

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

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

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

frighten away (verb)	scare away (verb)
cause to lose courage; to be daunted; to be scared away	cause to lose courage; to be daunted; to be scared away