1.subtraction

1.subtracation

1.subtractsion

1.subtracetion

1.separatation

2.separation

3.separatition

4.separateation

1.alterition

2.alteration

3.altersion

4.altertion

1.preserveation

2.preservition

3.preservation

3.preservesion

1.reflection

2.reflectsiion

3.reflectsion

4.reflectation

1.substitutsion

2.substitutation

3.substitution

4.substituton