There are 14 words that start with 'pso'.
| psoae | psoai | psoas |
| psocid | psoatic | psocids |
| psoralea | psoralen | psoraleas |
| psoralens | psoriases | psoriasis |
| psoriatic | psoriatics | |
Note: These 14 words that start with 'pso' are found from the USA & Canada version of the tournament Scrabble word list.