horrific vs frightening

horrific is not a noun while frightening is a noun.

Word	Noun	Adjective	Verb	Adverb
horrific	No	Yes	No	No
frightening	Yes	Yes	No	No

As adjectives, horrific and frightening are synonyms defined as:

Other synonyms of horrific include awful, dire, direful, dread, dreaded, dreadful, fearful, fearsome, horrendous, terrible.

horrific (noun)	frightening (noun)
	the act of inspiring with fear

horrific (adjective)	frightening (adjective)
causing fear or dread or terror	causing fear or dread or terror
grossly offensive to decency or morality; causing horror