Words That Rhyme With "Copperas" :

3 syllables:

biparous, Bosporus, dolorous, operant, operose, phosphorous, phosphorus, ponderous, properness, prosperous, saporous, sonorous, vaporous, viperous, watercress, waterless

4 syllables:

carposporous, cistophorus, cnidophorous, Ctenophorous, depauperate, Dinoceras, fetiparous, fissiparous, foetiparous, gemmiparous, homopterous, homosporous, improperness, isomerous, larviparous, macropterous, monoceros, monomerous, multiparous, nulliporous, obstreperous, orthopterous, oviparous, preposterous, pupiparous, rhinoceros, sporophorous, uniparous, unprosperous, viviparous, zoophorus

5 syllables:

adipocerous, electrophorus, galactophorous, heteromerous, heteropterous, heterosporous, hymenopterous, interoperates, lepidopterous, ommatophorous, Siphonophorous, sudoriparous

6 syllables:

basidiosporous, conidiophorous, ovoviviparous, radiophosphorus, semioviparous