substitute (suomeksi)

sijainen (s: replacement or stand-in / person)
korvike (s: replacement or stand-in / sijainen / of things, never people)
substituutti (s: taloustiede / yhteys)
korvata (v: to use in place of something else / to use X in place of Y / to replace X with Y / sports: to remove from the field and bring on another player / to serve as a replacement)
vaihtaa (v: sports: to remove from the field and bring on another player)
panna vaihtoon (v: sports: to remove from the field and bring on another player)
toimia sijaisena (v: to serve as a replacement)
sijaistaa (v: to serve as a replacement / sijaistaa / for somebody, temporarily)
varaosa (s: replacement or stand-in / sijainen)
vaihtopelaaja (s: player who is available to replace another)