Parallel moments in one dimesion, which is which? Time is not linear, it’s a tree branching in every direction. The skill to time travel depends on your ability to see every branch at the same time, like an interdimensional monkey stretching his imagination.
The ‘simultaneous’ is what is done or happens at the same time. The voice comes from the classical Latin ‘simultas’ which means “competition” or “rivalry”'. The root is ‘simul’: “together” or “at the same time”.