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.
busker bosker boskier bescour
bosker masker esker risker tusker busker whisker asker husker sacker suckier duskier saker eskar sucker muskier fossicker peskier siker skier boskier sicker riskier soaker huskier seeker whiskery
busk bask bisk bosk bosky bousouki bousoukia