There are 14 words that end with 'thmic'.
| isthmic | arythmic |
| rhythmic | eurythmic |
| arrhythmic | eurhythmic |
| unrhythmic | algorithmic |
| biorhythmic | dysrhythmic |
| logarithmic | polyrhythmic |
| antiarrhythmic | semilogarithmic |
Note: These 14 words that end with 'thmic' are found from the USA & Canada version of the tournament Scrabble word list.