There are 11 words that start with 'reall'.
| really | reallot | 
| reallots | reallocate | 
| reallotted | reallocated | 
| reallocates | reallotting | 
| reallocating | reallocation | 
| reallocations | |
Note: These 11 words that start with 'reall' are found from the USA & Canada version of the tournament Scrabble word list.