dumbstruck vs dumbstricken

dumbstruck and dumbstricken both are adjectives.

Word	Noun	Adjective	Verb	Adverb
dumbstruck	No	Yes	No	No
dumbstricken	No	Yes	No	No

As adjectives, dumbstruck and dumbstricken are synonyms defined as:

dumbstruck and dumbstricken: as if struck dumb with astonishment and surprise

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

dumbstruck (adjective)	dumbstricken (adjective)
as if struck dumb with astonishment and surprise	as if struck dumb with astonishment and surprise