There are 12 words that start with 'peroxi'.
| peroxid | peroxide | peroxids |
| peroxided | peroxides | peroxidic |
| peroxidase | peroxiding | peroxisome |
| peroxidases | peroxisomal | peroxisomes |
Note: These 12 words that start with 'peroxi' are found from the USA & Canada version of the tournament Scrabble word list.