There are 14 words that end with 'ntum'.
centum | mentum | omentum |
quantum | argentum | cementum |
lomentum | momentum | ramentum |
tomentum | sarmentum | tegmentum |
unguentum | argumentum | |
Note: These 14 words that end with 'ntum' are found from the USA & Canada version of the tournament Scrabble word list.