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.
salsas soleuses salacious slices sleazes sluices solaces solecise
balsas salsas lyssas valses calesas colzas glossas pulses dulses
salsa sals sailless sails sales sallies sallows sauls seals sels sols