Wanbelief is a rare word that means a lack of faith or disbelief. There are a number of synonyms for this word that are more commonly used, such as skepticism, doubt, uncertainty, suspicion, and incredulity. These words all convey the idea that one is unsure or unconvinced about a certain belief or idea. Other synonyms for wanbelief include mistrust, disbelief, unbelief, and distrust. These words all have slightly different connotations, but they all share the common theme of questioning or rejecting a belief or idea. Whether you use wanbelief or one of its many synonyms, it's important to have a firm understanding of the concept of doubt and uncertainty.