Hadline rhymes with:
angeline, bauerlein, beyerlein, bierlein, boline, bowline, doralynne, earline, edeline, eline, emelyne, erline, ernaline, exline, geosyncline, gosline, hertlein, idaline, juline, lurline, meline, merline, michaeline, movieline, oehrlein, pearline, sheline, stenglein, timeline
Hadline sounds like:
headline, hoodlum, hot-line, hotline