Synonyms and related words :
animate, assure, beef up, bolster, brace, brighten up, brisk, brisken, buck up, buttress, case harden, cheer, cheer up, chirk up, confirm, convalesce, embolden, encourage, enliven, exhilarate, fortify, fresh up, freshen, freshen up, gain strength, get better, gird, harden, hearten, improve, inspire, inspirit, invigorate, light up, nerve, perk up, pick up, prop, quicken, rally, reanimate, reassure, recreate, recruit, recuperate, refresh, refreshen, regale, reinforce, reinvigorate, renew, restrengthen, revive, revivify, set up, shore up, sleep it off, steel, stiffen, stimulate, strengthen, support, sustain, take courage, take heart, temper, toughen, turn the corner, undergird, vivify