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.
dear deair deary dearie doer tear dere dare deer derry teary diary deray dairy tar dor dry dray draw door dree drew tahr tare duro dory dour dorr durr taro dore tier dire dura dure doughier hydra dowry durra tarre hydro doura tarry terai terry terra
bear ear shear wear tear dear sear rear pear near lear gear hear fear year ar er