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.
glossa glossae gloss glossy glows glass glassy gallous colossi gallows glassie guls gals galliass galleass goalless galls gales gleys glazy calos gulls kilos glias glees class goals glaze galas glace cloys kolos gloze glues close gaols gules calesa guiles classy galeas gallus galahs goalies gulleys gullies gallies galleys keyless callose callous coalless colessee coulisse keelless
glossa loess loss lossy lyssa floss flossy colossi gloss glossae glossy