There are 10 words that end with 'gonium'.
| gonium | oogonium |
| ascogonium | archegonium |
| carpogonium | hormogonium |
| pelargonium | sporogonium |
| spermagonium | spermatogonium |
Note: These 10 words that end with 'gonium' are found from the USA & Canada version of the tournament Scrabble word list.