There are 13 words that start with 'recomb'.
| recomb | recombs | 
| recombed | recombine | 
| recombing | recombined | 
| recombines | recombinant | 
| recombining | recombinants | 
| recombination | recombinations | 
| recombinational | |
Note: These 13 words that start with 'recomb' are found from the USA & Canada version of the tournament Scrabble word list.