adjective. Synchronous.

Happening at the same time; simultaneous.

noun. That which happens at the same time with something else, or pertains to the same time.

adjective. Happening at, or belonging to, the same time; synchronous; simultaneous.

noun. A synchronal thing or event.

adjective. Synchronous.

adjective. occurring or existing at the same time or having the same period or phase

"At this sacrifice _there were voices and thundrings_, of the musick of the Temple, _and lightnings_ of the sacred fire, _and an earthquake_: and synchronal to these things was the sealing of _the 144000 out of all the twelve tribes of the children of _Israel_ with the seal of"

co-occurrent  coetaneous  coeval  coexistent  coexisting  

simultaneous  synchronous