There are 12 words that start with 'indor'.
| indorse | indorsed | indorsee | 
| indorser | indorses | indorsor | 
| indorsees | indorsers | indorsing | 
| indorsors | indorsement | indorsements | 
Note: These 12 words that start with 'indor' are found from the USA & Canada version of the tournament Scrabble word list.