Ifas rhymes with:
dreyfus, typhus, adolphus, amorphous, beilfuss, cephus, delfosse, dreyfus, dreyfuss, duffus, edifice, interoffice, jeffus, josephus, memphis, office, orifice, preface, resurface, rothfuss, rufus, searfoss, snafus, stoltzfus, subsurface, surface, typhus, ziegenfuss
Ifas sounds like:
ibach, ibex, ibis, ifs, ipco, ipock, ipsco, ivaco, ivax, ives