Spelunkers rhymes with:
clunkers, plunkers, bunkers, clunkers, munkres, plunkers, younkers, younkers', anchor's, anchors, banker's, bankers, bankers', bonkers, bunkers, cankers, clunkers, conquers, drinker's, drinkers, freethinkers, munkres, plunkers, rankers, stinkers, tankers, thinkers, tinker's, yonkers, younkers, younkers'