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.
routinize routines ruttiness rutins rootiness retines ratines ratanies retinues ruddiness rowdiness rottenness retinas retains retunes retenes radiance redenies riddance rudeness readiness reattains reediness
cutinize latinize patinize routinize deionize botanize photoionize cutinise luteinize mutinies tetanize teutonize