Found 2 items, similar to dumfounded.
English → English (WordNet) Definition: dumfounded dumfounded adj : as if struck dumb with astonishment and surprise; “a circle of policement stood dumbfounded by her denial of having seen the accident”; “the flabbergasted aldermen were speechless”; “was thunderstruck by the news of his promotion” [syn: dumbfounded, flabbergasted, stupefied, thunderstruck]
English → English (gcide) Definition: dumfounded dumfounded \dumfounded\ adj. same as dumbfounded. Syn: amazed, astonied, astonished, astounded, flabbergasted, stunned, stupefied, thunderstruck. [WordNet 1.5]