There are 13 words that end with 'thin'.
| thin | within |
| xanthin | lecithin |
| overthin | superthin |
| sympathin | ultrathin |
| cephalothin | fucoxanthin |
| lysolecithin | strophanthin |
| canthaxanthin | |
Note: These 13 words that end with 'thin' are found from the USA & Canada version of the tournament Scrabble word list.