Flattering rhymes with:
unflattering, clattering, unflattering, battering, chattering, clattering, nattering, scattering, shattering, smattering, spattering, unflattering
Flattering sounds like:
faltering, filtering, fledermaus, fluttering
unflattering, clattering, unflattering, battering, chattering, clattering, nattering, scattering, shattering, smattering, spattering, unflattering
faltering, filtering, fledermaus, fluttering