TenDer / DenTer

Following is a list of five pairs of clues. Each clue leads to a single word that refers to a person. It could be a profession, such as CARPENTER, or some other designation, such as CRYBABY.

The answer pairs will each have this property: one of the words can be converted to the other by swapping two of its letters.

For example, if a pair of clues is "caretaker" and "car damager," the answer might be
TENDER and DENTER.

1.	agronomist	housebuilder
2.	celebrity	Russian ruler
3.	clothier	patron
4.	contralto, e.g.	John Hancock, e.g.
5.	medical examiner	smooth singer

ANSWER