Synonyms of 'titter'
sniggerDictionary, laugh, giggle
Mention sex therapy and most people will titter with embarrassment.
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To chortle means to laugh in a way that shows you are very pleased.
He began chortling like an idiot.
When you chuckle, you laugh quietly.
He chuckled appreciatively at her riposte.
Thesaurus for titter from the Collins English Thesaurus
If someone titters , they give a short nervous laugh, especially when they are embarrassed about something.