I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
heroins heroines herons herns hernias harianas horns hairiness hoariness harness
groins heroins rins sciurines serines marines borons sarins pereons brines roans morons hyperons durions purins trains kroons prions drains mureins murrains mirins farinas chorions urines trines terrains drowns diurons brains brins browns bruins burins trones marrons neurones jarinas carrions crones crowns grains groans girons frons irones herons ruins gyrons coronas grins heroines rinse marinas carinas purines croons barons garrons maroons frowns rains pyrones dourines reins virions serins irons neurons sereins morrions murines perrons merinos parians neurines durians saurians terrines morions triens tronas drones turions chorines taurines shrines
heroin heroine herein hereon hernia herniae heron