Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun messmate
1 sense of messmate
Sense 1
messmate -- ((nautical) an associate with whom you share meals in the same mess (as on a ship))
=> acquaintance, friend -- (a person with whom you are acquainted; "I have trouble remembering the names of all my acquaintances"; "we are friends of the family")