There are 13 words that end with 'mulus'.
| cumulus | hamulus |
| limulus | fumulus |
| famulus | tumulus |
| stimulus | altocumulus |
| tristimulus | cirrocumulus |
| poststimulus | interstimulus |
| stratocumulus | |
Note: These 13 words that end with 'mulus' are found from the USA & Canada version of the tournament Scrabble word list.