tweak, boost, refine, overhaul, convert, renovate, mature, turn into, transfigure, complement, modify, alter, enlarge, widen, amplify, expand, exchange, restore, refurbish, improve, diversify, customize, transform, mitigate, purify, cleanse, augment, extend, broaden, introduce, perfect, revamp, make better, add (value/detail), enhance, modernize, build on/up, enrich, ameliorate, deepen
pick up, rise, pad, rear, bulk up, dilate, enlarge, lengthen, puff up, wax, infuse, widen, amplify, expand, magnify, ramp up, increase, develop, thrive, scale up, gain, regain, inflate, compound, rack up, augment, add to, extend, supplement, enhance, enrich, heighten, fluff up, flare forth/up, billow, beef up, round out, thicken, balloon, rightsize
bear, plow on, hold up, thwart, plug away, carry on, endure, persevere, tolerate, parry, swallow one's pride, withstand, sacrifice, resist, push through, forge ahead, push forward, press on, soldier on, grit (one's teeth), stick (to something), weather, sustain one's efforts, dedicate, confront (obstacles), intensify (one's work), redouble (one's efforts), outlast (naysayers), devote one's efforts to, carry through, come through, slog through (tasks), manage (challenges), ward off (doubts/opponents), push on
spread, hold up/out, slog through, plod along, multiply, adapt, stretch, advance, grow, befall, plug away, carry on, endure, persevere, persist, withstand, survive, maintain, develop, thrive, outlast, prevail, sustain, extend, renew, revive, last, linger, languish, retain, press on, come through, remain, eke out, subsist, prolong, fare, take (cover/refuge), update (a building), resurrect (itself), lay claim to, keep on/at