Blackpool rhymes with:
carpool, cesspool, claypool, claypoole, liverpool, texpool, vanderpool, whirlpool, agrifuel, carpool, cesspool, claypool, claypoole, dromgoole, highschool, liverpool, minuscule, molecule, overrule, ridicule, rookstool, saccule, texpool, vanderpool, vestibule, whirlpool
Blackpool sounds like:
blackball, blissful, blissfully