Here's what rhymes with caducean.
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twosome proven allusion collusion contusion solution pollution fusion illusion delusion dilution occlusion elution gruesome unproven ablution obtrusion conclusion confusion evolution diffusion intrusion perfusion effusion extrusion suffusion constitution execution resolution revolution exclusion dissolution inclusion infusion diminution profusion seclusion absolution convolution destitution devolution protrusion disillusion elocution involution locution preclusion lilliputian contribution institution persecution prostitution attribution restitution retribution reperfusion irresolution malocclusion antipollution distribution prosecution substitution transfusion reconstitution circumlocution electrocution redistribution counterrevolution ruin lumen neuen rumen newton lupin human union albumin acumen bitumen gluten illumine cumin crewman soupcon communion reunion subhuman inhuman disunion nonhuman nonunion groomsmen superhuman