world-shattering vs earthshaking

world-shattering and earthshaking both are adjectives.

Word	Noun	Adjective	Verb	Adverb
world-shattering	No	Yes	No	No
earthshaking	No	Yes	No	No

As adjectives, world-shattering and earthshaking are synonyms defined as:

world-shattering and earthshaking: sufficiently significant to affect the whole world

Other synonyms of world-shattering include world-shaking.

world-shattering (adjective)	earthshaking (adjective)
sufficiently significant to affect the whole world	loud enough to shake the very earth
	sufficiently significant to affect the whole world