Antonyms of noun surface_mail

1 sense of surface mail

Sense 1
surface mail -- (mail that is sent by land or sea)
       Antonym of air mail (Sense 1)
      => air mail -- (mail that is sent by air transport)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun surface_mail

1 sense of surface mail

Sense 1
surface mail -- (mail that is sent by land or sea)
       => mail -- (the bags of letters and packages that are transported by the postal service)