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