There are 16 words that start with 'pleo'.
| pleon | pleons |
| pleonal | pleonic |
| pleopod | pleonasm |
| pleopods | pleonasms |
| pleochroic | pleonastic |
| pleochroism | pleomorphic |
| pleochroisms | pleomorphism |
| pleomorphisms | pleonastically |
Note: These 16 words that start with 'pleo' are found from the USA & Canada version of the tournament Scrabble word list.