There are 18 words that start with 'whirl'.
| whirl | whirls | whirly |
| whirled | whirler | whirlers |
| whirlier | whirlies | whirling |
| whirliest | whirligig | whirlpool |
| whirlwind | whirligigs | whirlpools |
| whirlwinds | whirlybird | whirlybirds |
Note: These 18 words that start with 'whirl' are found from the USA & Canada version of the tournament Scrabble word list.