There are 9 13-letter words that start with 'peri'.
| perichondrium | periodicities |
| periodization | periodontally |
| periodontists | periostitises |
| perishability | perissodactyl |
| peritonitises | |
Note: These 9 13-letter words that start with 'peri' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with perio, perip, peris, peric, perit, peril, perid, perig, perim, perin, peria, periw, perih, perik, perib, periq.
5-letter words start with 'peri' (2)