- Acceptable substitute - Replacement - Stand-in - Substitute person - Substitute, deputy - A deputy; a delegate; a substitute. - The deputy of an ecclesiastical judge, most commonly of
a bishop or his chancellor, especially a deputy who grants marriage
licenses.
- Barter - Replacement - Understudy - One who, or that which, is substituted or put in the
place of another; one who acts for another; that which stands in lieu
of something else - a person who enlists for military service in the place
of a conscript or drafted man. - To put in the place of another person or thing; to
exchange.
- Replacement actor - Standby actor - Theatre stand-in - To study, as another actor's part, in order to
be his substitute in an emergency; to study another actor's part. - One who studies another's part with a view to assuming
it in an emergency.