Sniggering refers to a smug or scornful laughing or giggling sound that often occurs at the expense of others. Many synonyms are available for this word, including snickering, tittering, sneering, chuckling, and cackling. Snickering is a more muffled version of sniggering, whereas tittering implies a softer and more restrained form of laughter. Sneering, however, denotes a level of contempt or disdain, and chuckling is a gentle form of amusement or humor. Finally, cackling is a more high-pitched form of sniggering or laughing that is often associated with witches in popular culture. All of these synonyms convey a sense of amusement or scorn, but the degree and tone of the laughter may differ.