Aliasing mount/rider_relationship → mount/rider_relations
Link to alias

Reason:

I had a small struggle remembering the exact wording of the mount/rider_relations tag.

Some of these may also help:
rider/mount_relationship -> mount/rider_relations
mount/rider -> mount/rider_relations
rider/mount -> mount/rider_relations

OR BETTER YET

aliasing them all to "mount/rider" (alphabetically/ordered) akin to how several combinations of "predator and prey relationships" are aliased to predator/prey (on that note, maybe pred/prey and prey/pred should be added to that list)