Ostensibly rhymes with:
sensibly, irresponsibly, responsibly, sensibly, flexibly, forcibly, impossibly, inadmissibly, inflexibly, irresponsibly, irreversibly, noticeably, passably, peaceably, possibly, responsibly, sensibly
sensibly, irresponsibly, responsibly, sensibly, flexibly, forcibly, impossibly, inadmissibly, inflexibly, irresponsibly, irreversibly, noticeably, passably, peaceably, possibly, responsibly, sensibly