There are 10 words that end with 'ptides'.
| riptides | peptides |
| dipeptides | mucopeptides |
| octapeptides | polypeptides |
| glycopeptides | neuropeptides |
| pentapeptides | fibrinopeptides |
Note: These 10 words that end with 'ptides' are found from the USA & Canada version of the tournament Scrabble word list.