"Tee hee" is a common expression used to indicate laughter or amusement. However, there are several synonyms for this phrase that can help you mix up your vocabulary. Some alternative expressions include "giggle," "chuckle," "snicker," and "titter." These words all convey a sense of light-hearted joy but have slightly different connotations. For example, a giggle is typically more high-pitched and bubbly, while a chuckle is more subdued and mellow. Snicker and titter are similar to "tee hee" in that they are slightly mischievous and often used to express a sense of secret amusement. Overall, exploring different synonyms for "tee hee" can add variety and fun to your language.