| Solution | Length | |
|---|---|---|
| 3 letters | ||
| pop | 3 | |
| 4 letters | ||
| jilt | 4 | |
| fast | 4 | |
| dash | 4 | |
| bang | 4 | |
| plop | 4 | |
| slap | 4 | |
| 5 letters | ||
| prior | 5 | |
| plunk | 5 | |
| smack | 5 | |
| plump | 5 | |
| short | 5 | |
| sharp | 5 | |
| 6 letters | ||
| sudden | 6 | |
| abrupt | 6 | |
| 7 letters | ||
| hastily | 7 | |
| 8 letters | ||
| scotfree | 8 | |
| suddenly | 8 | |
| abruptly | 8 | |
| unawares | 8 | |
| 9 letters | ||
| unguessed | 9 | |
| allatonce | 9 | |
| SUMMARILY | 9 | |
| 10 letters | ||
| UNHERALDED | 10 | |
| UNFORESEEN | 10 | |
| unexpected | 10 | |
| IMPROBABLY | 10 | |
| 11 letters | ||
| unhoped for | 11 | |
| UNANNOUNCED | 11 | |
| unpredicted | 11 | |
| impetuously | 11 | |
| of-a-sudden | 11 | |
| by-surprise | 11 | |
| STARTLINGLY | 11 | |
| IMPLAUSIBLY | 11 | |
| IMPULSIVELY | 11 | |
| OLAFASUDDEN | 11 | |
| 12 letters | ||
| surprisingly | 12 | |
| outoftheblue | 12 | |
| UNLOOKED FOR | 12 | |
| like-a-flash | 12 | |
| allofasudden | 12 | |
| UNEXPECTEDLY | 12 | |
| 13 letters | ||
| likeaboltfrom | 13 | |
| unpredictably | 13 | |
| unforeseeably | 13 | |
| precipitously | 13 | |
| unpredictable | 13 | |
| unforeseeable | 13 | |
| PRECIPITATELY | 13 | |
| precipitantly | 13 | |
| UNANTICIPATED | 13 | |
| 14 letters | ||
| without-notice | 14 | |
| 15 letters | ||
| on-short-notice | 15 | |
| unanticipatedly | 15 | |
| 18 letters | ||
| like-a-thunderbolt | 18 | |