swap


Concise Oxford English Dictionary © 2008 Oxford University Press:
swap /swɒp/ (also swop)
verb (swaps, swapping, swapped) exchange or substitute. noun an act of exchanging one thing for another.
– derivatives
swappable adjective,
swapper noun.
– origin ME (in the sense ‘throw forcibly’): prob. imitative of a resounding blow.
'swap' also found in these Oxford entries:

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