| unawares(adverb, prepared, suddenly, unexpectedly, abruptly) |
| suddenly(adverb, unexpectedly, unawares, abruptly, ignorantly) |
| aback(adverb, short, prepared, sudden, suddenly) |
| short(adverb, prepared, unprepared, sudden, suddenly) |
| without warning(expression, adverb, suddenly, unexpectedly, unawares) |
| abruptly(adverb, short, sudden, suddenly, unexpectedly) |
| accidentally(adverb, short, sudden, suddenly, unexpectedly) |
| by accident(expression, adverb, short, sudden, suddenly) |
| by mistake(expression, adverb, short, sudden, suddenly) |
| carelessly(adverb, short, sudden, suddenly, unexpectedly) |
| ignorantly(adverb, short, sudden, suddenly, unexpectedly) |
| inadvertently(adverb, short, sudden, suddenly, unexpectedly) |
| mistakenly(adverb, short, sudden, suddenly, unexpectedly) |
| off guard(expression, adverb, short, sudden, suddenly) |
| sudden(adverb, short, suddenly, unexpectedly, unawares) |
| surprisingly(adverb, short, sudden, suddenly, unexpectedly) |
| unconsciously(adverb, short, sudden, suddenly, unexpectedly) |
| unexpectedly(adverb, short, sudden, suddenly, unawares) |
| unintentionally(adverb, short, sudden, suddenly, unexpectedly) |
| unknowingly(adverb, short, sudden, suddenly, unexpectedly) |