at the same time

concurrent

accompanying agreeing coetaneous coeval coexistent coexisting coincident coinciding concurring contemporaneous contemporary dead heat in sync synchronal synchronic synchronous with the beat

asynchronous different divided following preceding separate

interim

interregnum interruption interval meanwhile recess while

concurrently for now for the duration for the moment for then in the interim in the interval in the meanwhile simultaneously

albeit although at during howbeit immediately upon just after just as meanwhile much as whereas while

although during during the time in the time throughout the time whilst