| Solution | Length | |
|---|---|---|
| 3 letters | ||
| wax | 3 | |
| 4 letters | ||
| math | 4 | |
| teem | 4 | |
| sire | 4 | |
| grow | 4 | |
| rise | 4 | |
| | ||
| 5 letters | ||
| times | 5 | |
| widen | 5 | |
| tally | 5 | |
| breed | 5 | |
| swell | 5 | |
| score | 5 | |
| 6 letters | ||
| dublin | 6 | |
| reckon | 6 | |
| throng | 6 | |
| spread | 6 | |
| enrich | 6 | |
| rabbit | 6 | |
| stream | 6 | |
| 7 letters | ||
| produce | 7 | |
| upsurge | 7 | |
| augment | 7 | |
| 8 letters | ||
| snowball | 8 | |
| shoot up | 8 | |
| separate | 8 | |
| manifold | 8 | |
| subtract | 8 | |
| work-out | 8 | |
| increase | 8 | |
| redivide | 8 | |
| | ||
| 9 letters | ||
| procreate | 9 | |
| reproduce | 9 | |
| reinforce | 9 | |
| propagate | 9 | |
| pullulate | 9 | |
| 10 letters | ||
| swarm with | 10 | |
| strengthen | 10 | |
| 11 letters | ||
| proliferate | 11 | |