There are 15 words that end with 'grades'.
| grades | aggrades | degrades |
| regrades | upgrades | misgrades |
| paygrades | subgrades | downgrades |
| overgrades | biodegrades | intergrades |
| retrogrades | tardigrades | plantigrades |
Note: These 15 words that end with 'grades' are found from the USA & Canada version of the tournament Scrabble word list.