Copious rhymes with:
olympias, acrimonious, aeneas, aerolineas, agregious, alias, amphibious, antonius, aquarius, aqueous, bilious, bockius, bournias, brosious, celsius, claudius, coleus, commodious, contemporaneous, courteous, curious, cyrenius, deleterious, delirious, demetrius, denarius, devious, dimitrius, dimitrius', dionysius, dubious, envious, erroneous, extraneous, fabrizius, fastidious, felonious, fresenius, furious, gaseous, glorious, gregarious, habeas, harmonious, hideous, hilarious, homogeneous, hovious, igneous, ignominious, illustrious, imperious, impervious, indubious, industrious, inglorious, injurious, insidious, instantaneous, invidious, laborious, lacksadaiscious, lascivious, lugubrious, luxurious, marius, masius, mauritius, melodious, meritorious, miscellaneous, mobius, morphonios, murias, mysterious, nefarious, notorious, nucleus, oblivious, obsequious, obvious, octavius, odious, odysseus, olympias, orpheus, palonius, pancreas, parsimonious, penurious, percutaneous, perseus, phineas, plinius, precarious, previous, punctilious, radius, sanctimonious, sergius, serious, simultaneous, spontaneous, spurious, stradivarius, studious, supercilious, tavoulareas, tedious, thaddeus, thelonius, unceremonious, various, vesuvius, vicarious, victorious, vilnius, vitreous, vitruvius, yglesias
Copious sounds like:
cab's, cabbage, cabbages, cabbies, cabezas, cabok, caboose, cabooses, cabs, cafes, cap's, capacious, capasso, capece, capeci, capek, capes, capizzi, capozzi, capps, cappuccio, cappy's, caps, capshaw, capsize, cavaco, cavazos, cave's, caves, cbs, cebu's, cephas, cephus, cevaxs, chacabuco, chafee's, chafes, chapas, chapek, chappuis, chaps, chaves, chavez, chavis, chavis', chavous, checkbook, checkbooks, checkups, chef's, chefs, chekhov's, chesapeake, cheves, chevies, chevik, chevis, chevy's, chevys, chiapas, chiapas', chief's, chiefs, chiefs', chip's, chipps, chips, chivas, chives, chop-suey, chops, chopsuey, chubais, chubb's, chubbuck, ciba's, civic, civics, cobaugh, cobbs, cobos, cobs, cobwebs, coffee's, coffeehouse, coffeehouses, coffees, cookbook, cookbook's, cookbooks, coovick, copas, copco, copes, copiague, copies, coppage, coppess, coppock, copps, cops, copsey, copus, cosby's, coupes, coups, covas, coves, cowboy's, cowboys, cowboys', cuba's, cubbage, cubbies, cubes, cubic, cubic's, cubs, cubs', cuevas, cuffs, cupcake, cupcakes, cupps, cups