rattling vs terrific

rattling is a noun but terrific is not a noun.

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

As adjectives, rattling and terrific are synonyms defined as:

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

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

rattling (noun)	terrific (noun)
a rapid series of short loud sounds (as might be heard with a stethoscope in some types of respiratory disorders)

rattling (adjective)	terrific (adjective)
quick and energetic	causing extreme terror
extraordinarily good or great; used especially as intensifiers	extraordinarily good or great; used especially as intensifiers
	very great or intense

rattling (adverb)	terrific (adverb)
used to give emphasis