camaraderie

noun2

1. •
   A close friendship in a group of friends or teammates.

   • Moreover, a spirit of camaraderie exists between the staff of the railway and its regular patrons. — 1958
2. •
   A spirit of familiarity and closeness, especially when expressed somewhat boisterously.

   • There was not one of Napoleon's intimate friends, however high in rank, who would have ventured to indulge in the sort of camaraderie which was kept up between the Emperor and his old moustaches. — 1838