User blog comment:Kogath/Monster Hunter: World Discussion/@comment-24734669-20191124082725/@comment-4370375-20191126221709

To be fair, it doesn't look like Odogaron and Zinogre fight each other even though they've presumably crossed paths in either the Coral Highlands or the Guiding Lands. Zinogre doesn't even fight Ebony which it has an even higher chance of crossing paths with.

This suggests that they may coexist peacefully or at least leave each other alone.