Caplin rhymes with:
kaplin, aplin, applin, kaplin, taplin, aplin, applin, champlin, choplin, coplin, eplin, esplin, joplin, kaplin, kemplin, koplin, kopplin, pamplin, poplin, striplin, tamplin, taplin, templin
Caplin sounds like:
cableone, caplan, cephalon, chaplain, chaplan, chaplin, choplin, cipollone, civilian, cofflin, copelan, copelin, coplan, coplen, coplin, coppolino, couvillion, couvillon