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

• replacement
• substitution
• switch
• transposition

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

• fluctuation
• variation

2. (noun) the act of changing the arrangement of a given number of elements

• mathematical operation
• mathematical process
• operation

3. (noun) complete change in character or condition

• transformation
• translation

4. (noun) act of changing the lineal order of objects in a group

• reordering

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

• alternate
• flip
• flip-flop
• interchange
• switch
• tack
• exchange
• switch
• switch over
• exchange
• interchange
• replace
• substitute
• fill in
• stand in
• sub
• substitute
• replace
• swap
• switch
• swop
• trade

2. (noun) the act of changing the arrangement of a given number of elements

• commute
• permute
• transpose

3. (noun) act of changing the lineal order of objects in a group

• commute
• permute
• transpose