There are 16 words that start with 'tubu'.
| tubule | tubular | tubules |
| tubulin | tubulate | tubulins |
| tubulose | tubulous | tubulure |
| tubularly | tubulated | tubulates |
| tubulator | tubulures | tubulating |
| tubulators | ||
Note: These 16 words that start with 'tubu' are found from the USA & Canada version of the tournament Scrabble word list.