deputize

Verb
  1. Act as a substitute (synset 202399804)
    "She stood in for the soprano who suffered from a cold"
    is a type of: replace, supersede, supervene upon, supplant - take the place or move into the position of
    subtypes: cover - help out by taking someone's place and temporarily assuming his responsibilities
    same as: deputise, step in, substitute
  2. Appoint as a substitute (synset 202399587)
    is a type of: appoint, charge - assign a duty, responsibility or obligation to
    same as: depute, deputise

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