in sync

circumstantial coeval coexisting coincident concerted concomitant contemporaneous incidental parallel synchronal synchronous

disagreeing divergent nonconcurrent

concurrent

accompanying agreeing at the same time coetaneous coeval coexistent coexisting coincident coinciding concurring contemporaneous contemporary dead heat synchronal synchronic synchronous with the beat

asynchronous different divided following preceding separate

calm cool stable well-adjusted well-balanced well-organized

imbalanced unstable upset

all at once all together as one at one fell swoop closely coincidentally collectively combined commonly concertedly concomitantly concurrently conjointly contemporaneously en masse hand in glove hand in hand in a body in concert in cooperation in one breath in tandem in unison jointly mutually on the beat side by side simultaneously synchronically unanimously unitedly with one accord with one voice with the beat

closely collectively in tandem jointly simultaneously

unitedly

all together as one at one fell swoop coincidentally combined commonly concertedly concomitantly concurrently conjointly contemporaneously en masse hand in glove hand in hand in a body in concert in cooperation in one breath in unison mutually on the beat side by side synchronically unanimously with one accord with one voice with the beat

apart individually separately