| SWISHIEST | • swishiest adj. Superlative form of swishy: most swishy. • SWISHY adj. swishing. |
| SWITCHIER | • SWITCHY adj. full of switches. |
| WHIFFIEST | • whiffiest adj. Superlative form of whiffy: most whiffy. • WHIFFY adj. smelly. |
| WHIMMIEST | • WHIMMY adj. full of whims. |
| WHIMSIEST | • WHIMSY adj. full of whims. |
| WHINGIEST | • WHINGY adj. complaining. |
| WHINNIEST | • WHINNY adj. abounding in whins. |
| WHIPPIEST | • whippiest adj. Superlative form of whippy: most whippy. • WHIPPY adj. pliant, supple. |
| WHIRLIEST | • whirliest adj. Superlative form of whirly: most whirly. • WHIRLY adj. given to whirling. |
| WHIRRIEST | • WHIRRY adj. characteristic of a whir. |
| WHITEFISH | • whitefish n. Any of many fish. • whitefish n. The beluga (both the sturgeon and the whale). • whitefish v. To fish for whitefish. |
| WHITELIST | • whitelist n. (Law, computing) A list or collection of people or entities that are known, trusted, or explicitly permitted. • whitelist v. (Transitive) To place on a whitelist; to mark or note a person or entity as trustworthy or acceptable. • white␣list n. Alternative form of whitelist. |
| WHIZZIEST | • whizziest adj. Superlative form of whizzy: most whizzy. • WHIZZY adj. using sophisticated technology to achieve vivid effects, also WHIZZO. |
| WIDTHWISE | • widthwise adj. Directed across the width of an object or place. • widthwise adv. Across the width of an object or place. • WIDTHWISE adv. across the width, as distinct from lengthways, also WIDTHWAY, WIDTHWAYS. |
| WINTERISH | • winterish adj. Characteristic of winter. • WINTERISH adj. like winter. |
| WITCHIEST | • witchiest adj. Superlative form of witchy: most witchy. • WITCHY adj. malicious. |