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.
daddies didies dadoes dads dowdies toadies dauties doodies toddies teddies dawties dudes duads dites diets dados dates dadas deads duties dodoes todies didoes tidies diodes tatties ditties deities dits tads duds datos ditas doits duits deeds dawts dodos dauts deets doats dotes toads duets tates didos ditsy tides deduce dittos dattos todays doodoos duteous tedious titties tutties
biddies teddies middies cuddies giddies caddies fuddies toddies daddies noddies widdies shoddies waddies muddies buddies eddies baddies soddies laddies kiddies neddies paddies dies caddis foodies gaddis didies bodies hoodies howdies eddoes rowdies toadies readies wadies goodies woodies nudies ladies caddice boodies kiddoes bawdies dudes goddess diets doodies todies tidies gaudies dowdies roadies beedies adieus dites dis
daddy duddie caddied waddied dad