Synonyms|243Antonyms|67|Broader|4Narrower|13Related|213

25 entries under flabbergasted topic. ×

2
clammed up(expression, adjective, close, quiet, soft)
2
close-mouthed(adjective, close, quiet, soft, low)
1
cool as cucumber(expression, adjective, idiom, astonished, thunderstruck)
1
unflappable(adjective, astonished, thunderstruck)
0
gobsmacked(adjective, overcome, astonished, overwhelmed, astounded)
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ChicagoSmart Define. 2015. "speechless thesaurus" https://smartdefine.org/speechless/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, speechless thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/speechless/thesaurus/synonyms>.
MLASmart Define. "speechless thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/speechless/thesaurus/synonyms>