There are 15 words that start with 'decli'.
| decline | declined |
| decliner | declines |
| decliners | declining |
| declinist | declivity |
| declinable | declinists |
| declination | declivities |
| declivitous | declinations |
| declinational | |
Note: These 15 words that start with 'decli' are found from the USA & Canada version of the tournament Scrabble word list.