There are 14 words that start with 'rube'.
| rube | rubel | rubes | 
| rubels | rubella | rubeola | 
| rubellas | rubeolar | rubeolas | 
| rubellite | rubescent | rubellites | 
| rubefacient | rubefacients | |
Note: These 14 words that start with 'rube' are found from the USA & Canada version of the tournament Scrabble word list.