What is another word for "double"?

Roget's Thesaurus (1911) lists these synonyms for "double": abate, abatement, abuse, abusive, accent, account, accountable, accountant, acquit, actuary, agio, ahead, akimbo, allow, allowance, ambiguity, anagram, and, antiphrasis, archaic, archaism, argot, arithmetic, arms, assets, audit, auditor, babu, backwardation, balance, ban, barbarism, bargain, bark, bate, bean, beard, beat, below, bid.