sex change 
noun
A change in a person’s physical sexual characteristics, typically by surgery and hormone treatment: he campaigned to have his sex change legally recognized [as modifier]: a sex-change operation...
- The reason she had left him was because he had a sex change operation and was a drug addict.
- I can't imagine a tougher choice to make than the one to have a sex change operation.
- Myron has decided, for reasons we do not know, to have a sex change operation and become Myra.
- exceptional
- exceptionalism
- exceptionality
- exceptionally
- excerpt
- excerptible
- excerption
- excess
- excess baggage
- excessive
- excessively
- excessiveness
- exch.
- exchange
- exchangeability
- exchangeable
- Exchange Alley
- exchange contracts
- exchange control
- exchanger
- exchange rate
- Exchange Rate Mechanism
- exchange-traded fund
- exchange transfusion
- exchequer