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.
chord chored choroid choired chard chorioid choreoid shored chared charred chirred churred charade chaired cheered shard shred sherd chart chert short shorty shrewd shroud shared cherty shaird charity cheroot sheared sheered shirred shortie chariot shrewdie
chord board short sherd chored chard word whored sord ordo fiord ford fordo hard herd hoard horde cord cored gored gourd lord moored orad pored sored whort wordy bored shard shored shred
chore chorea ochreae ochre echoer churro churr choir chiru chirre chirr chiro cherry chary charry charro charr chare char shore ichor ochrea ochry