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.
critic cretic critique cardiac quartic caretake caretook
ferritic pyritic iritic noritic soritic neuritic dioritic neritic critic erratic toreutic aortic barytic heretic diuretic cerotic paretic portico dieretic cretic periotic uretic xerotic piratic neurotic erotic veridic uratic iridic juridic erotica parotic hieratic diaeretic quartic pyretic pyridic druidic phreatic choreatic
crit caried cart carte crate cried curite curt grit gritty acrid scried