substitution

nouns

an event in which one thing is substituted for another
"the replacement of lost blood by a transfusion of donor blood"
permutation, replacement, substitution, switch, transposition
is derived from
substitute
is derived from
substitute
the act of putting one thing or person in the place of another: "he sent Smith in for Jones but the substitution came too late to help"
commutation, exchange, substitution
is derived from
substitute