There are 16 words that start with 'irid'.
| irid | irids | irides |
| iridic | iridium | iridiums |
| iridology | iridescent | iridosmine |
| iridescence | iridologies | iridologist |
| iridosmines | iridescences | iridescently |
| iridologists | ||
Note: These 16 words that start with 'irid' are found from the USA & Canada version of the tournament Scrabble word list.