All possible synonyms of the word 1st-class mail as well as its hypernyms, hyponyms, antonyms, derivations, entailments, meronyms, pertainyms, domain members, similar words, verb groups, and so on...
First class, 1st class, first-class mail, 1st-class mail
- mail that includes letters and postcards and packages sealed against inspection
- first class
- 1st class
- first-class mail
- 1st-class mail
- mail: the bags of letters and packages that are transported by the postal service
- correspondence: communication by the exchange of letters
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