Blockheads rhymes with:
bulkheads, airheadz, arrowheads, beachheads, bulkheads, bullheads, copperheads, deadheads, egghead's, eggheads, flatheads, foreheads, loggerheads, overheads, skinheads, warheads, whitehead's
Blockheads sounds like:
ballasts, ballistic, ballistics, bellsouth's, biologists, blackouts, blackstock, blasts, blockades, bulkheads