Synonyms and related words :
act for, bounce, cast out, change places with, crowd out, cut out, dismiss, displace, double for, eject, exchange, expel, fill in for, force out, ghost, ghostwrite, oust, pinch-hit, relieve, remove, replace, represent, spell, spell off, stand in for, step, subrogate, substitute, substitute for, succeed, supersede, swap places with, turn out, understudy for, unseat, usurp