Overdrawn rhymes with:
draughn, drawn, redrawn, withdrawn, aleron, braun, braune, brawn, caron, craun, dameron, doiron, draughn, drawn, garon, jiron, maron, miron, naron, pierron, praun, prawn, raun, redrawn, salmeron, straughn, strawn, thereon, varon, von-braun, withdrawn, zamarron
Overdrawn sounds like:
overthrown, overtrain, overturn