Caplan rhymes with:
kaplain, kaplan, chaplain, chaplan, chaplin, kaplain, kaplan, chaplain, chaplan, chaplin, coplan, discipline, kaplain, kaplan, koplan, pomplun
Caplan sounds like:
cableone, caplin, cephalon, chaplain, chaplan, chaplin, choplin, cipollone, civilian, cofflin, copelan, copelin, coplan, coplen, coplin, coppolino, couvillion, couvillon