horrible vs frightful

horrible and frightful both are adjectives.

Word	Noun	Adjective	Verb	Adverb
horrible	No	Yes	No	No
frightful	No	Yes	No	No

As adjectives, horrible and frightful are synonyms defined as:

Other synonyms of horrible include atrocious, horrifying, ugly.

horrible (adjective)	frightful (adjective)
provoking horror	provoking horror
	extremely distressing
	extreme in degree or extent or amount or impact