Shackletons rhymes with:
shackleton's, shackleton's, shackleton's, hamilton's, hamiltons, nettleton's, shackleton's, singleton's, templeton's, carlton's, dalton's, daltons, fulton's, gjelten's, hamilton's, hamiltons, hilton's, hiltons, nettleton's, shackleton's, shelton's, singleton's, sultan's, sultans, templeton's, walton's, waltons
Shackletons sounds like:
salting, saluting, scalding, scolding, shackleton's, shelton's, shielding, skeletons, slating, sledding, sleuthing, sliding, slitting, slotnick, slotting, slowdowns, solutions, sultan's, sultans