mateship

Short definition from Wiktionary

Noun

1. 1
   The post of mate on a ship; a posting as mate.
2. 2
   A type of contract between ships to cooperate and share the proceeds of an expedition.
3. 3
   Fellowship; companionship.
4. 4
   Friendship, particularly between men, such as develops in shared adversity; solidarity.
5. 5
   A relationship based on mating.