There are 16 words that end with 'mmas'.
| commas | gummas | mammas |
| lemmas | mommas | gammas |
| summas | grammas | shammas |
| stemmas | digammas | dilemmas |
| analemmas | neurilemmas | sarcolemmas |
| plasmalemmas | ||
Note: These 16 words that end with 'mmas' are found from the USA & Canada version of the tournament Scrabble word list.