Synonyms|9Antonyms|0|Broader|2Narrower|0Related|3
2
bull
1
billet-doux
1
dead letter
1
encyclical
1
letter of credit(expression, idiom)
1
letters of marque(expression, idiom)
1
love letter
1
newsletter
1
round robin
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APASmart Define. (2015). open letter thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/open_letter/thesaurus/synonyms
ChicagoSmart Define. 2015. "open letter thesaurus" https://smartdefine.org/open_letter/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, open letter thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/open_letter/thesaurus/synonyms>.
MLASmart Define. "open letter thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/open_letter/thesaurus/synonyms>