There are 15 words that end with 'onged'.
bonged | gonged | longed |
ponged | tonged | sponged |
pronged | thonged | wronged |
belonged | thronged | prolonged |
dingdonged | diphthonged | multipronged |
Note: These 15 words that end with 'onged' are found from the USA & Canada version of the tournament Scrabble word list.