scare away vs frighten off

scare away and frighten off both are verbs.

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

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

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

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

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