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.
chais chaise chis chaos chase chaws chays chias chasse chiaus chose sheas shahs shies shaws chess chews shays chows choosy chowse chouse choose choice cheesy cheese wyches choosey choughs shaughs chez shes
chais ais has his sheas shaws raise chis hies chays raias chase hays chaise dais liaise daisy hiss phis quais chaws ghis ghazi paise hahs rais chaos paisa phase haws chias haes shahs shays shies
chai chi chao chaw chay chia chiao chichi