Darpa rhymes with:
arpa, scarpa, arpa, scarpa, serpa, agrippa, aliquippa, alpa, apopa, arpa, autospa, campa, canepa, cappa, chalupa, champa, chapa, ciampa, cobepa, coipa, copa, coppa, culpa, dopa, europa, filipa, gappa, giampa, giampapa, hoppa, kampa, kappa, kempa, knippa, krempa, kroupa, krupa, kruppa, kulpa, lipa, lippa, lupa, maricopa, matsapa, mericopa, mitteleuropa, mogopa, nalepa, napa, nappa, nepa, papa, pappa, petipa, philippa, pompa, popa, poppa, potempa, pupa, purpa, rappa, ripa, scapa, scarpa, schiappa, serpa, sipa, skippa, skorupa, stopa, stupa, suppa, tampa, tegucigalpa, tipa, tupa, vespa, willapa, yucaipa, zamarripa, zappa, zepa
Darpa sounds like:
darby, dauterive, deharbe, derby, derive, diatribe, dorf, dorff, drab, drape, drapeau, dravo, drip, drive, drive-by, driveway, droop, droopy, drop, drop-off, dropoff, drove, drub, drupe, durfee, durfey, dwarf