terrific vs howling

terrific is not a noun while howling is a noun.

Word	Noun	Adjective	Verb	Adverb
terrific	No	Yes	No	No
howling	Yes	Yes	No	No

As adjectives, terrific and howling are synonyms defined as:

terrific and howling: extraordinarily good or great; used especially as intensifiers

Other synonyms of terrific include fantastic, grand, marvellous, marvelous, phenomenal, rattling, tremendous, wonderful, wondrous.

terrific (noun)	howling (noun)
	a long loud emotional utterance

terrific (adjective)	howling (adjective)
causing extreme terror	extraordinarily good or great; used especially as intensifiers
extraordinarily good or great; used especially as intensifiers
very great or intense