Thesaurus
Synonyms and Antonyms of dumbfounded
- dumbfounded by the realization that he had just won the grand prize in the multistate lottery
blindsided, startled, surprised (also surprized)
aghast, appalled, dismayed, horrified
blasé (also blase), casual, nonchalant, unruffled
- dumbfounded visitors to the Grand Canyon
amazed, astonished, astounded, awed, awestruck (also awestricken), flabbergasted, marveling (or marvelling), openmouthed, wondering
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