Tittering is a word often used to describe a nervous or light laughter. Some synonyms for tittering include giggling, chuckling, snickering, cackling, and sniggering. Giggling refers to a high-pitched, childlike laughter, while chuckling is a quieter, more controlled laughter. Snickering and sniggering are often used to describe a mean-spirited or mocking laughter. Cackling is a loud, raucous laughter often associated with witches or evil characters. Overall, these synonyms for tittering provide a range of descriptions for different types of laughter, each with their own nuances in meaning.