first-class vs ripping

first-class and ripping both are adjectives.

Word	Noun	Adjective	Verb	Adverb
first-class	No	Yes	No	No
ripping	No	Yes	No	No

As adjectives, first-class and ripping are synonyms defined as:

Other synonyms of first-class include excellent, fantabulous, mean, splendid.

first-class (adjective)	ripping (adjective)
very good; of the highest quality	resembling a sound of violent tearing as of something ripped apart or lightning splitting a tree
	very good; of the highest quality