Giggle
Part of speech: verb
Definition: To laugh gently or in a high-pitched voice; to laugh in a silly or giddy way.
Part of speech: noun
Definition: A high-pitched, silly laugh. Amusement.
Example sentence: I don't take me seriously. If we get some giggles, I don't mind.
Titter
Part of speech: noun
Definition: A nervous or repressed giggle.
Part of speech: verb
Definition: To laugh or giggle in a somewhat subdued manner.