at the same time

Strongest match

concurrent

Weak matches

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

Strongest match

interim

Strong matches

interregnum, interruption, interval, meanwhile, recess, while

Weak matches

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

Weak matches

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

Weak matches

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