staggering vs astonishing

staggering and astonishing both are adjectives.

Word	Noun	Adjective	Verb	Adverb
staggering	No	Yes	No	No
astonishing	No	Yes	No	No

As adjectives, staggering and astonishing are synonyms defined as:

staggering and astonishing: so surprisingly impressive as to stun or overwhelm

Other synonyms of staggering include astounding, stupefying.

staggering (adjective)	astonishing (adjective)
so surprisingly impressive as to stun or overwhelm	so surprisingly impressive as to stun or overwhelm
	surprising greatly