There are 10 words that start with 'ub'.
| ubiety | ubique |
| ubieties | ubiquity |
| ubiquinone | ubiquities |
| ubiquitous | ubiquinones |
| ubiquitously | ubiquitousness |
Note: These 10 words that start with 'ub' are found from the USA & Canada version of the tournament Scrabble word list.