Backdoors rhymes with:
commodore's, ecuador's, indoors, salvador's, baltimore's, bangalore's, becor's, bellcore's, bookstores, carnivores, centaur's, centaurs, centocor's, commodore's, dinosaurs, downpours, drugstores, ecuador's, encor's, encores, indoors, megastores, mentor's, nucor's, phosphors, salvador's, sophomores, superstores, toystores, unprofor's
Backdoors sounds like:
babysitters, backstairs, backstroke, backtrack, backtracks, backwaters, bacteria's, bastarache, baxter's, boisterous, bookstores, booster's, boosters, busters