ROGET THESAURUS
Supersede
Disuse
VB
not use, do without, dispense with, let alone, not touch, forbear, abstain, spare, waive, neglect, keep back, reserve, lay up, lay by, lay on the shelf, keep on the shelf, lay up in ordinary, lay up in a napkin, shelve, set aside, put aside, lay aside, disuse, leave off, have done with, supersede, discard, dismiss, give warning, throw aside, make away with, cast overboard, heave overboard, throw overboard, cast to the dogs, cast to the winds, dismantle, lie unemployed, remain unemployed.
Relinquishment
VB
relinquish, give up, abandon, desert, forsake, leave in the lurch, go back on, depart from, secede from, withdraw from, back out of, leave, quit, take leave of, bid a long farewell, vacate, renounce, forego, have done with, drop, disuse, discard, wash one's hands of, drop all idea of, break off, leave off, desist, stop, hold one's hand, stay one's hand, quit one's hold, give over, shut up shop, throw up the game, throw up the cards, give up the point, give up the argument, pass to the order of the day, move to the previous question, relinquish, give up, surrender, yield, cede, let go, let slip, spare, drop, resign, forego, renounce, abandon, expropriate, give away, dispose of, part with, lay aside, lay apart, lay down, lay on the shelf, set aside, put aside, put away, make away with, cast behind, maroon, give notice to quit, give warning, supersede, be rid of, get rid of, be quit of, get quit of, eject, rid oneself of, disburden oneself of, divest oneself of, dispossess oneself of, wash one's hands of, discard, cast off, dismiss, cast away, throw away, pitch away, fling away, cast aside, cast overboard, cast to the dogs, throw aside, throw overboard, throw to the dogs, pitch aside, pitch overboard, pitch to the dogs, fling aside, fling overboard, fling to the dogs, cast to the winds, throw to the winds, sweep to the winds, put away, turn away, sweep away, jettison, reject, quit one's hold, quitclaim.
Substitution
VB
substitute, put in the place of, change for, make way for, give place to, supply the place of, take the place of, supplant, supersede, replace, cut out, serve as a substitute, step into stand in the shoes of, jury rig, make a shift with, put up with, borrow from Peter to pay Paul, take money out of one pocket and put it in another, cannibalize, commute, redeem, compound for.