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.
ditties deities titties dites dittos didies duties dits tatties dawties tutties dauties titis dotes duits tides totes ditas ditsy diets tates dates doits diodes todies tuttis dattos tidies didoes tutees teddies daddies tootsie toadies toddies doodies duteous dowdies tets ditz tats tots dots tuts tits didos touts teats datos dudes duets doats deeds ditzy tauts deads deets dawts toots toits dauts tutus dadoes dodoes tootsy tattoos tedious
fatties patties tutties kitties tatties cutties jetties jutties chitties titties catties ditties hotties butties putties potties ties rottes fyttes mattes laities battues puttees settees dauties pities reties tates bawties duties cities lattes ghettoes whities lattice tuttis moieties buttes cooties pieties cuties booties beauties footies suttees sties mottoes dawties fouettes gaieties mottes totes deities lottes tides tis
ditto ditty tittie dittoed dit