grummer grummest grummet grummeted grummeting grummets grumness grumose grumose grumous
| grumous grump grumped grumph grumphed grumphie (current term) grumphies grumphing grumphs grumphy
| grumpier grumpiest grumpily grumpiness grumpinesses grumping grumpish grumps grumpy grundel
|