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.
hers hears heirs hoers heres heros haeres heroes heresy hearse hearsay heiress herries horse hairs horsy hours hires haars horas hares hoars houris horsey horahs hirees harass hoarse harissa harries harrows heroize hoorahs hoorays hurrahs hurrays hurries
beers jeers shiers cheers tiers deers sers ruers peers ers veers viers hers hoers biers goers cooers kiers queers queuers leers liers hypers piers seers suers doers wooers sheers shoers