Heparin rhymes with:
cephalosporin, halperin, pamperin, aherin, algarin, amarin, bajarin, bufferin, bugarin, bukharin, cephalosporin, halperin, intrauterine, katherine, mahurin, mulherin, pamperin, pelerin, pellerin, premarin, severin, wangerin
Heparin sounds like:
haberman, habermann, habyarimana, havran, havron, heavrin, hebron, hefferan, hefferman, heffern, heffernan, hefferon, heffron, hepburn, hibernia, hoberman, hooperman, huberman, hyperion