| dumbfounded(adjective, awkward, shy, silent, dazed) |
| flabbergasted(adjective, speechless, overwhelmed, overawed) |
| gobsmacked(adjective, speechless, overwhelmed, overawed) |
| inarticulate(adjective, quiet, awkward, silent, halting) |
| incoherent(adjective, quiet, halting, speechless, wordless) |
| incredulous(adjective, speechless, overwhelmed, overawed) |
| knocked for six(expression, adjective, idiom, speechless, overwhelmed) |
| mousy(adjective, quiet, speechless) |
| mum(adjective, quiet, awkward, silent, speechless) |
| mute(adjective, quiet, awkward, silent, speechless) |
| overawed(adjective, speechless, overwhelmed) |
| overwhelmed(adjective, overrun, swarming, speechless, overawed) |
| quiet(adjective, speechless) |
| run over(expression, adjective, overrun, swarming, blown-away) |
| silent(adjective, quiet, awkward, speechless) |
| soundless(adjective, quiet, speechless) |
| stunned(adjective, speechless, overwhelmed, overawed) |
| tongue-tied(adjective, quiet, awkward, silent, halting) |
| uncommunicative(adjective, quiet, awkward, silent, speechless) |
| voiceless(adjective, quiet, awkward, silent, speechless) |