There are 14 words that start with 'macul'.
| macula | macule | maculae | 
| macular | maculas | maculed | 
| macules | maculate | maculing | 
| maculated | maculates | maculating | 
| maculation | maculations | |
Note: These 14 words that start with 'macul' are found from the USA & Canada version of the tournament Scrabble word list.