| not predicted(expression, adverb, unpredictable, surprising, unanticipated) |
| rash(adjective, sudden, unlooked-for, unhoped) |
| rushing(adjective, sudden, unlooked-for, unhoped) |
| spontaneous(adjective, sudden, unlooked-for, unhoped) |
| surprising(adjective, adverb, surprise, unexpected, unpredicted) |
| unexpectedly(adjective, adverb, unpredictable, surprising, subitaneous) |
| unplanned(adjective, adverb, surprise, unexpected, unprepared) |
| unprepared for(expression, adverb, unpredictable, surprising, unanticipated) |
| urgent(adjective, sudden, unlooked-for, unhoped) |
| without warning(expression, adjective, extraordinary, wonderful, surprise) |
| acute(adjective, sudden, unlooked-for, unhoped) |
| instant(adjective, sudden, unlooked-for, unhoped) |
| flashing(adjective, sudden, unlooked-for, unhoped) |
| fleeting(adjective, sudden, unlooked-for, unhoped) |
| instantaneous(adjective, sudden, unlooked-for, unhoped) |
| quickening(adjective, sudden, unlooked-for, unhoped) |
| reckless(adjective, sudden, unlooked-for, unhoped) |
| rushed(adjective, sudden, unlooked-for, unhoped) |
| sharp(adjective, sudden, unlooked-for, unhoped) |
| speedy(adjective, unpredictable, surprising, subitaneous) |