ಅರ್ಥ : An event in which one thing is substituted for another.
							ಉದಾಹರಣೆ : 
							The replacement of lost blood by a transfusion of donor blood.
							
ಸಮಾನಾರ್ಥಕ : replacement, substitution, switch, transposition
ಅರ್ಥ : The act of changing the arrangement of a given number of elements.
ಅರ್ಥ : Complete change in character or condition.
							ಉದಾಹರಣೆ : 
							The permutations...taking place in the physical world.
							
ಅರ್ಥ : Act of changing the lineal order of objects in a group.