coincident with; while; simultaneously
the same age; same period
simultaneous development; spreading at the same time (e.g. two phenomena)
simultaneous interpretation; simultaneous interpreting
simultaneous terrorist attacks (esp. the Sep. 11 attacks); synchronized terrorist attacks
timing is everything; don't jump the gun
simultaneous recording; synchronous recording
timing is everything; don't jump the gun
double election (e.g. of the lower and higher chambers)