Synonyms and related words :
biform, bifurcated, bilateral, bipartisan, bipartite, dichotomous, double, doubled, duadic, dual, dualistic, duplex, dyadic, echoed, identical, matched, plagiarized, quoted, rechauffe, redoubled, reduplicated, reechoed, regurgitated, reiterate, reiterated, repeated, reproduced, retold, twain, twice-told, twin, twinned, two, two-sided, warmed up