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.
plashed pleached polished polychete polychaete
lashed plashed leashed slashed clashed flashed bleached welshed fleshed slushed galoshed blushed pleached lushed coalshed relished leached sloshed flushed toolshed polished woolshed
plash plashy plush plushy aplasia splash splashy