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.
diet dit dita doit duit died dite deet duet didie deity ditty diode ditto dautie dawtie duddie tet tit did dot dawt dido tide daut teat dote dead doat titi didy date data dato doty dude duty tied deed toit datto deedy dotty titty