List of sustain synonyms and sustain related words.
abide, abide with, admit, advocate, affirm, afford support, allege in support, allow, answer, approve, argue for, assert, attest, authenticate, authorize, back, back up, be exposed to, be subjected to, bear, bear out, bear up, bear up under, bear with, beef up, befriend, bide, board, bolster, bolster up, brace, brace up, brave, bread, brook, buoy, buoy up, buttress, care for, carry, carry on, case harden, certify, champion, cherish, circumstantiate, coddle, confirm, conserve, contend for, continue, continue to be, copyright, corroborate, cosset, counter, cradle, crutch, cultivate, cushion, defeat time, defend, defy time, digest, dine, document, dry-nurse, dwell, encounter, endorse, endure, espouse, exist, experience, extend, favor, feed, feel, finance, float, float high, fodder, fondle, forage, fortify, foster, fund, gird, give support, go, go on, go through, grass, gratify, graze, guard, hang in, hang in there, hang tough, harden, have, hold, hold on, hold out, hold up, invigorate, keep, keep afloat, keep alive, keep going, keep intact, keep inviolate, keep on, keep safe, keep up, know, labor under, last, last long, last out, lavish care on, lend support, lengthen, live, live on, live through, lug, lump, lump it, mainstay, maintain, make a plea, meat, meet, meet up with, meet with, mess, mother, nerve, not destroy, not endanger, not expend, not use up, not waste, nourish, nurse, nurture, nutrify, pack, pamper, pass through, pasture, patent, pay, perdure, perennate, perpetuate, persevere, persist, persist in, pillow, plead for, preserve, prevail, probate, prolong, prop, prop up, protect, protract, prove, provision, put up with, ratify, rebut, recognize, refresh, refute, regale, register, reinforce, reinvigorate, remain, reply, respond, restrengthen, retain, ride high, riposte, run, run on, run up against, sanction, satisfy, save, say in defense, see, shore, shore up, shoulder, spare, speak for, speak up for, spend, spoon-feed, stand, stand by, stand for, stand under, stand up for, stay, stay on, steel, stick, stick up for, stiffen, stomach, strengthen, subsidize, subsist, substantiate, subvention, subventionize, suckle, suffer, support, survive, take up with, tarry, taste, temper, tide over, tolerate, tote, toughen, underbrace, undergird, undergo, underlie, underpin, underset, upbear, uphold, upkeep, uplift, upraise, urge reasons for, validate, verify, waft, warrant, wear, wear well, weather, wet-nurse, wine and dine, withstand