asynchronous
The outcrops are the result of non-synchronous erosion of the rock.
The patient was observed to shake his legs violently in a nonsynchronous fashion.
The analysis highlighted the nonsynchronous development of ice cover in this glaciated region.

SMART Vocabulary: related words and phrases

Simultaneous and consecutive
accompanied by someone/something
accompaniment
accompany
all the whileidiom
along
go along
heavy rotation
in parallelidiom
in rotationidiom
in tandemidiom
minute
process
soon
step
straight
successive
successively
sync
turn
while