Planner rhymes with:
banner, branner, canner, danner, hanner, kanner, manner, manor, sanner, scanner, spanner, tanner
Planner sounds like:
palmer, palmeri, palmero, palmieri, palmira, palmore, palomar, plainer, planar, planer, plenary, plenmeer, plumer, plumeri, plummer, pollner, polymer, pulmonary