equilibrium
labyrinthine sense
vestibular sense
sense of balance
sense of equilibrium

He had lost his sense of balance in the darkness.

Or is it that I've lost my sense of balance?

The important thing was to keep a good sense of balance.

Her sense of perspective and balance simply could not deal with it.

A sense of balance comes through when he is talking.

It also says a great deal about your sense of balance here.

That makes it pretty important to have a good sense of balance.

I had to struggle to keep a sense of balance.

I am not against this at all, but we must keep a sense of balance.

I do ask you for some sense of balance about what's going on here.