Synonyms|53Antonyms|0|Broader|0Narrower|2Related|21
2
bull
2
letter(noun, note)
2
letters of marque(expression, idiom)
2
love letter
2
mash note
1
aerogram
1
air letter
1
airgraph
1
chain letter
1
dead letter
1
dimissorial
1
dimissory letter
1
drop letter
1
encyclical
1
fan letter
1
form letter
1
letter of credit(expression, idiom)
1
letter of introduction(expression, idiom)
1
letters credential
1
letters of request(expression, idiom)
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APASmart Define. (2015). Billet-doux thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/billet-doux/thesaurus/synonyms
ChicagoSmart Define. 2015. "Billet-doux thesaurus" https://smartdefine.org/billet-doux/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, Billet-doux thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/billet-doux/thesaurus/synonyms>.
MLASmart Define. "Billet-doux thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/billet-doux/thesaurus/synonyms>