Spelunks rhymes with:
clunks, flunks, bunks, chunks, clunks, debunks, drunks, dunks, flunks, funks, hunks, monk's, monks, punks, skunks, strunk's, trunks, tunks
Spelunks sounds like:
sapling, saplings, scuffling, sephlon's, shoveling, shuffling, sibling, siblings, spalink, spelling, spelling's, spellings, spellman's, spelunk, spilling, splenic, spoiling, squabbling, supplying, swiveling