There are 15 words that start with 'synthe'.
| syntheses | synthesis |
| synthetic | synthesist |
| synthesize | synthetase |
| synthetics | synthesists |
| synthesized | synthesizer |
| synthesizes | synthetases |
| synthesizers | synthesizing |
| synthetically | |
Note: These 15 words that start with 'synthe' are found from the USA & Canada version of the tournament Scrabble word list.