There are 10 words that start with 'coinv'.
| coinvent | coinvents |
| coinvented | coinventor |
| coinvestor | coinventing |
| coinventors | coinvestors |
| coinvestigator | coinvestigators |
Note: These 10 words that start with 'coinv' are found from the USA & Canada version of the tournament Scrabble word list.