Querimonious is a term that describes someone who is full of complaints or is constantly venting their grievances. However, there are many other words that can convey a similar meaning. Some synonyms for querimonious include grumbling, whining, griping, moaning, groaning, carping, and grousing. Each of these words has a slightly different connotation, but all describe someone who is complaining excessively and often without justification. It can be frustrating to be around someone who is querimonious, but it is important to remember that everyone has bad days and it may be helpful to offer a listening ear or some words of encouragement to help them through their difficulties.