Boardwalks rhymes with:
sidewalks, sidewalks, airlocks, blackhawk's, blackhawks, cornstalks, echohawk's, gamecocks, goldilocks, hydrox, mohawks, nighthawks, seahawks, sidewalks, skyhawks, tomahawks, toolbox
Boardwalks sounds like:
bartels, bartles, bartolucci, bertels, bertolucci, birdlike, birtley's, boardwalk, bradlees, bradley's, bradleys, breathless, brothels, brutalize, brutalizes