Akademik

substitution
noun
1. an event in which one thing is substituted for another (Freq. 1)
-

the replacement of lost blood by a transfusion of donor blood

Syn: ↑permutation, ↑transposition, ↑replacement, ↑switch
Derivationally related forms: ↑switch (for: ↑switch), ↑replace (for: ↑replacement), ↑substitute
Hypernyms: ↑variation, ↑fluctuation
2. 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"
Syn: ↑exchange, ↑commutation
Derivationally related forms: ↑commute (for: ↑commutation), ↑exchange (for: ↑exchange), ↑substitute
Hypernyms: ↑change
Hyponyms: ↑replacement, ↑replacing, ↑subrogation, ↑weaning, ↑ablactation

Useful english dictionary. 2012.