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.
sublot sublet sublate subulate suability sibilate
blot sublot doublet bailout ballot belt blat blet bloat bibelot bolt giblet cablet cobalt goblet riblet sublet tablet