| unexpected(adjective, great, excellent, shock, violent) |
| unanticipated(adjective, adverb, great, excellent, superb) |
| accidental(adjective, chance, shocking, astonishing, intention) |
| fortuitous(adjective, chance, shocking, astonishing, intention) |
| sudden(adjective, extraordinary, wonderful, quick, abrupt) |
| unpredicted(adjective, adverb, great, excellent, superb) |
| abrupt(adjective, violent, fast, quick, heedless) |
| unlooked-for(adjective, secret, unexpected, surprising, unanticipated) |
| extraordinary(adjective, great, excellent, superb, super) |
| startling(adjective, great, excellent, superb, super) |
| chance(adjective, shocking, astonishing, astounding, unintentional) |
| splendid(great, excellent, superb, super, groovy) |
| surprising(adjective, adverb, wonderful, quick, abrupt) |
| unplanned(adjective, chance, lucky, unintentional, accidental) |
| casual(adjective, chance, random, liable, unintentional) |
| adventitious(adjective, chance, unplanned, unintentional, accidental) |
| unannounced(adjective, secret) |
| hasty(adjective, violent, fast, quick, abrupt) |
| out of the blue(adjective, adverb, surprising, unpredicted) |
| quick(adjective, violent, fast, abrupt, hasty) |