There are 12 words that end with 'osin'.
| eosin | rosin | myosin |
| pocosin | tylosin | chymosin |
| nigrosin | thymosin | actomyosin |
| meromyosin | erythrosin | tropomyosin |
Note: These 12 words that end with 'osin' are found from the USA & Canada version of the tournament Scrabble word list.