1. A grumbler.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• broeser,
• grously,
• grosey,
• groucery,
• grocier,
• grosery,
• trosser,
• greeser,
• grosed,
• brouser,
• couser,
• drousey,
• groose,
• groue,
• grousery,
• grousp,
• grous,
• gouse,
• cruser,
• jrousers

• grouse,
• crosser,
• grouses,
• grosser,
• grocer.

The adjective form of the word "grouser" is "grousing".

The plural of the "Grouser" can be the "grousers".

The singular of the "Grouser" can be the "Grouser".