understudy
1. [ verb ] (education) be an understudy or alternate for a role
Synonyms: alternate
Related terms: memorize alternation
2. [ noun ] (theater,performing arts) an actor able to replace a regular performer when required
Synonyms: standby
Related terms: actor stand_by
Similar spelling:   understood
  understand
  understated
  underbody
  underpart
  understaffed
  undershot
  under_arms
  undergird
  understock
  understate
  underspent
  underspend
  undersexed
  underskirt
  undersized
  undershirt
  undershoot
  underworld
  under_wraps
  undersealed
  unaddressed
  under_it
  underact
  underbid
  undersea
  undercut
  underfed
  underfur
  underside
  Underwood
  underwear
  underway
  underboss
  underbred
  undercoat
  underfelt
  underfoot
  undergarment
  underhand
  undergrad
  underived
  underlay
  understanding
  underpass
  underpay
  underrate
  underseal
  undersoil
  undersell
  undersize
  undersign
  underhung
  undershrub
  underwater
  underplay
  underquote
  underbrush
  unadorned
  underslung
  under_way
  underscore