The word "grouching" refers to complaining or grumbling. There are several synonyms for this word such as whining, grumbling, carping, grousing, moaning, and muttering. Whining means to complain in a petulant or in a high-pitched voice. Grumbling refers to low and continuous complaints. Carping means to find fault or criticize unnecessarily. Grousing is used to describe a prolonged and persistent complaint. Moaning means to express dissatisfaction or pain. Muttering refers to quiet and indistinct complaints. These synonyms have similar meanings to "grouching", and can be used interchangeably in different contexts. However, it is important to note that excessive complaining can be tiresome and unproductive.