A poet or writer who specializes in writing couplets, or someone who writes verse characterized by frequent rhyming pairs of lines.
From 'couplet' (two consecutive rhyming lines) + '-eer' (one who practices). The suffix '-eer' often indicates someone who does something habitually or professionally, as in 'privateer' or 'musketeer.'
Alexander Pope was perhaps history's greatest coupleteer—his rhyming couplets were so smooth and clever that he made the form seem effortless, though in reality achieving that perfection took obsessive revision.
Complete word intelligence in one call. Free tier — 50 lookups/day.