Strapping rhymes with:
trapping, rapping, scrapping, trapping, unwrapping, wrapping, capping, clapping, flapping, lapping, mapping, napping, rapping, recapping, sapping, scrapping, slapping, snapping, tapping, trapping, unwrapping, wrapping, zapping
Strapping sounds like:
starving, sterbenz, strafing, stravinsky, stravinsky's, stripping, striving, strivings, struebing