Drop-offs rhymes with:
dropoffs, dropoffs, dropoffs, dropoffs, ripoffs, castoffs, cutoffs, dropoffs, hoelterhoff's, knockoffs, layoffs, payoffs, playoffs, ripoffs, selloffs, spinoffs, standoffs, takeoffs, tarnoff's, tartikoff's, tartikoffs, tradeoffs
Drop-offs sounds like:
darby's, derives, derubeis, dervish, dervishich, diatribes, drabek, drabik, drabs, drapes, dravecky, draves, dravis, dravo's, drawback, drawbacks, drawbaugh, drebsky, dreyfus, dreyfus's, dreyfuss, dribs, dripps, drips, drive's, drives, driveways, dropoffs, drops, dropsy, droves, drupes, dwarfs, dwarves