There are 12 words that start with 'dubi'.
| dubiety | dubious |
| dubieties | dubiosity |
| dubiously | dubitable |
| dubitably | dubitation |
| dubiosities | dubiousness |
| dubitations | dubiousnesses |
Note: These 12 words that start with 'dubi' are found from the USA & Canada version of the tournament Scrabble word list.