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.
whosis whoosis wussies wises wazoos wisses wusses wheezes whizzes wiseass
meiosis whosis gnosis whoosis miosis sis cassias missis gooses daisies hoses lassis gnoses lysis hissies meioses kneesies tussis nooses wussies niseis oasis poesies posies psis rooses cissies sissies dassies doses loses chaoses chooses mioses chassis isseis basis phasis assais gussies coses looses bossies lassies easies diesis quassias busies hussies missies cassis physis cosies noesis noses oses poses poussies pussies roses sassies newsies tassies seis choses
whose whoso wos whys woes woos wows twos