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.
bullish bluish blueish blush bolshy bolshie belch bleach blotch blotchy
bullish hellish dollish dullish tallish bluish fluish foolish ghoulish coolish mulish owlish palish polish relish delish
bull billie boulle bulla bullae bully abulia