substitute [substituted, substituting, substitutes]◼◼◼(to use in place of something else) verb [UK: ˈsʌb.stɪ.tjuːt] [US: ˈsʌb.stə.ˌtuːt]You cannot substitute money for health. = On ne peut pas substituer l'argent pour la santé.
step in◼◻◻(To act as a replacement or substitute.) verb [UK: step ɪn] [US: ˈstep ɪn]