Understudy

Definition:

• (v. t. & i.) To study, as another actor's part, in order to be his substitute in an emergency; to study another actor's part.
• (n.) One who studies another's part with a view to assuming it in an emergency.

Compare understudy with other words:

performer vs. understudy

required vs. understudy

normal vs. understudy

extent vs. understudy

replace vs. understudy

role vs. understudy

know vs. understudy

study vs. understudy

ghost vs. understudy