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.
basil basal basely bassly busily bacilli basally bossily bezil byssal boozily
basil deasil messily easily queasily vasal cosily fusil fossil busily fusile measly easel reassail noisily resile mussily sassily missile dossil teasel weasel sessile fissile lousily resail assail loessial jezail gassily sill silo soil fussily measle sail assoil nosily rosily nasal scissile mousily basal bossily tahsil wassail cheesily
bas baas baiza baize base bass bassi basso bassy bays bias boas abas abase babies obas