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.
tenses tennises teniases taeniases tonuses tenaces tansies teniasis duenesses taeniasis danseuse deionizes dunnesses tenacious dances dunces downsize
hanses manses senses menses rinses censes tenses lenses guanases rawnesses hances vinasses minces noises genuses niseis tansies anuses fences nonces tennises coynesses lionesses lances nooses dunnesses faiences nonuses vainnesses fewnesses mensas ensues jaunces quinsies seances chances winzes wannesses unsews tonuses ounces duenesses zoonoses conioses bounces pansies geniuses sanseis cansos nances bonuses keennesses gooeynesses finesses hansas feynesses pounces pensees launces mannoses quinces nauseas lownesses ionises linseys kneesies leannesses fiances hypnoses newsies bonzes ponces geneses anises newnesses gaynesses minuses meannesses sciences nonissues nuances onuses genoises gneisses joneses nouses finises nownesses kineses noses penises lionises senseis gnoses census rances kinases rennases nesses venuses wrynesses sinuses dances dunces taeniases teniases jounces uneases waenesses winces woenesses shynesses
tense tens tuns tins dens dense taenias tans tansy teens teensy tenace tenias tennies tennis tenues tenuis tenuous tons stenos