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.
tip tipi tippy top tup tap dip tape typp tapa topi tepa topo tope typy typo type dippy taupe tepoy topoi tepee typey topee tawpie teapoy teepee toupee