denmate

plural denmates

1. A member of the same den of animals.

   All the other cubs came forward and smelled their new denmate.

   1984, Owens, Mark, 1944-; Owens, Delia, Cry of the Kalahari

   2 more examples

   The Associated Press reported that the polar bears had murdered their denmate, that the other animals had “snarled and howled, leaping and tearing at the kill.”

   1932 November 7, Time 1932-11-07: Vol 20 Iss 19

   Mousefur emerged stiffly from the elders' den, guiding her blind denmate, Longtail, with her tail.

   2007, Hunter, Erin, The Sight