There are 18 words that start with 'simo'.
| simony | simoom | simoon | 
| simooms | simoons | simoleon | 
| simoniac | simonies | simonist | 
| simonize | simoleons | simoniacs | 
| simonists | simonized | simonizes | 
| simoniacal | simonizing | simoniacally | 
Note: These 18 words that start with 'simo' are found from the USA & Canada version of the tournament Scrabble word list.