8 entries under informality topic. ×

14
bye(farewell, interjection, expression, idiom, parting)
13
cheerio(farewell, expression, idiom, interjection, parting)
11
bye-bye(farewell, expression, idiom, interjection, parting)
6
Ciao(farewell, interjection, parting, departure)
4
Ta-ta(interjection, farewell, parting)
2
cheery-bye(farewell, interjection, parting)
1
toodle-oo(interjection, farewell, parting)
0
see you tomorrow(interjection, farewell, parting)
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APASmart Define. (2016). sayonara thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/sayonara/thesaurus/synonyms
ChicagoSmart Define. 2016. "sayonara thesaurus" https://smartdefine.org/sayonara/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, sayonara thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/sayonara/thesaurus/synonyms>.
MLASmart Define. "sayonara thesaurus" 30 March 2016. Web. 28 September 2026. <https://smartdefine.org/sayonara/thesaurus/synonyms>