Synonyms for replace:
discard, reinstate, obviate, dispel, act for, shuck off, rearrange, eradicate, renew, root out, usurp, quench, cast aside, bundle off, sit in for, make up for, supersize, chase away, restore, follow, slough off, dispense with, rotate.
succeed, junk, dismiss, unseat, offload, ditch, postdate, relieve, jettison, prune, spell, cast off, do away with, quell, kiss off, throw away, palm off, bin, shed.
unload, return, banish, cleanse, throw off, purge.
toss, scrap, trash, flush, reverse, eliminate, chuck.
substitute, act for.
Sense 2 (noun)
supervene upon, substitute, supplant, put back, supersede.
supplant, second, exchange, substitute, represent, commute, switch, displace, swap, trade, alternate, change, imitate, subrogate, supersede.
take the place of; put in place of (verb)
supersede, displace, sub, change, restore, succeed, follow, substitute, fill in, reinstate, supplant, stand in, put back.