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