thunderstruck vs dumbfounded

thunderstruck and dumbfounded both are adjectives.

Word	Noun	Adjective	Verb	Adverb
thunderstruck	No	Yes	No	No
dumbfounded	No	Yes	No	No

As adjectives, thunderstruck and dumbfounded are synonyms defined as:

thunderstruck and dumbfounded: as if struck dumb with astonishment and surprise

Other synonyms of thunderstruck include dumbstricken, dumbstruck, dumfounded, flabbergasted, stupefied.

thunderstruck (adjective)	dumbfounded (adjective)
as if struck dumb with astonishment and surprise	as if struck dumb with astonishment and surprise