howling vs wonderful

howling is a noun but wonderful is not a noun.

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

As adjectives, howling and wonderful are synonyms defined as:

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

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

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

howling (adjective)	wonderful (adjective)
extraordinarily good or great; used especially as intensifiers	extraordinarily good or great; used especially as intensifiers