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