Defender's rhymes with:
defenders, defenders, defenders, fenders, offenders, bender's, benders, blenders, contenders, defenders, enders, endres, fenders, genders, lender's, lenders, lenders', offenders, penders, pretenders, renders, senders, spenders, surrenders, suspenders, tenders, vendor's, vendors, vendors', wenders
Defender's sounds like:
debentures, debentures', defenders