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.
bluest blest blast bulliest blasty ballast blastie blessed bloused ballista ballistae blazed belaced blissed blowsed blowzed
bluest fliest halest vilest hilliest fullest foulest vealiest roiliest silliest celesta dullest palliest palest teleost molest wooliest lowliest chillest coolest shaliest illest shoalest jowliest fellest least realest coaliest lest lust holiest blest bulliest lusty ruliest sliest celeste eeliest tallest paliest wiliest oiliest woolliest mealiest chilliest gluiest shelliest jolliest shoaliest
bluesy blues blueys bales biles bless blouse blousy boles bolus ables