There are 13 words that start with 'chemos'.
| chemos | chemosorb |
| chemostat | chemosorbs |
| chemostats | chemosorbed |
| chemosorbing | chemosurgery |
| chemosurgical | chemosurgeries |
| chemosyntheses | chemosynthesis |
| chemosynthetic | |
Note: These 13 words that start with 'chemos' are found from the USA & Canada version of the tournament Scrabble word list.