stupefying vs astounding

stupefying and astounding both are adjectives.

Word	Noun	Adjective	Verb	Adverb
stupefying	No	Yes	No	No
astounding	No	Yes	No	No

As adjectives, stupefying and astounding are synonyms defined as:

stupefying and astounding: so surprisingly impressive as to stun or overwhelm

Other synonyms of stupefying include astonishing, staggering.

stupefying (adjective)	astounding (adjective)
shocking with surprise and consternation	so surprisingly impressive as to stun or overwhelm
making physically stupid or dull or insensible	bewildering or striking dumb with wonder
so surprisingly impressive as to stun or overwhelm