permutation

Noun

• act of changing the lineal order of objects in a group

• complete change in character or condition
  • the permutations...taking place in the physical world- Henry Miller
    

• the act of changing the arrangement of a given number of elements

• an event in which one thing is substituted for another
  • the replacement of lost blood by a transfusion of donor blood
    

Related words

• Synonyms: 
  substitution , transposition , replacement , switch