There are 14 words that start with 'calm'.
| calm | calms | calmed |
| calmer | calmly | calmest |
| calming | calmness | calmative |
| calmingly | calmatives | calmnesses |
| calmodulin | calmodulins | |
Note: These 14 words that start with 'calm' are found from the USA & Canada version of the tournament Scrabble word list.