There are 21 words that start with 'knot'.
| knot | knots | knotty |
| knotted | knotter | knothole |
| knotless | knotlike | knotters |
| knottier | knottily | knotting |
| knotweed | knotgrass | knotholes |
| knottiest | knottings | knotweeds |
| knottiness | knotgrasses | knottinesses |
Note: These 21 words that start with 'knot' are found from the USA & Canada version of the tournament Scrabble word list.