There are 11 words that end with 'roidal'.
| gyroidal | toroidal | choroidal |
| steroidal | thyroidal | asteroidal |
| spheroidal | chancroidal | meteoroidal |
| nonsteroidal | saccharoidal | |
Note: These 11 words that end with 'roidal' are found from the USA & Canada version of the tournament Scrabble word list.