Synonyms and related words :
accelerate, aggravate, beef up, blow up, come again, complicate, concentrate, condense, consolidate, copy, deepen, ditto, do a repeat, do again, do over, double, dupe, duplicate, echo, enhance, exacerbate, exaggerate, geminate, heat up, heighten, hop up, hot up, imitate, ingeminate, intensify, jazz up, key up, magnify, make complex, mount, multiply by two, parrot, plagiarize, quote, ramify, redo, reduplicate, reecho, regurgitate, reincarnate, reinforce, renew, repeat, replicate, reproduce, revive, rise, rouse, say again, sharpen, soup up, step up, strengthen, triple, twin, whet