| cloth | cloths | clothes | clothing | clothed | clothesline |
| three | threes | threesome | threefold | threesome | threefold |
| throb | throbs | throbbing | throbbed | heartthrob | heartthrobs |
| throw | throws | throwing | thrower | thrown | throwback |
| length | lengths | lengthen | lengthened | lengthening | wavelength |
| health | healthy | unhealthy | healthier | healthiest | healthcare |
| white | whites | whiten | whitest | whiteboard | whitening |
| wheel | wheels | wheelie | wheeling | cartwheel | wheelbarrow |
