There are 15 words that start with 'monar'.
| monarch | monarda | 
| monarchs | monarchy | 
| monardas | monarchal | 
| monarchic | monarchial | 
| monarchies | monarchism | 
| monarchist | monarchical | 
| monarchisms | monarchists | 
| monarchically | |
Note: These 15 words that start with 'monar' are found from the USA & Canada version of the tournament Scrabble word list.