1.commutation n.
2.exchange n.
3.replacement n.
4.substitute n.
5.substitution n.
6.swop n.
7.truck n.
8.f exchange, barter, swop, substitution, substitute, replacement
9.substitute; replacement
10.replacement
11.surrogate
12.trade in
13.commutation
14.analog analogue
15.(во спорт) sub
