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.
condoes condos connotes contes contos candies conduce conoids countess contessa coonties counties kendos canids counts gonads conatus contuse canities cants cunts kinds cantos cantus kentes gannets ganoids gunites quintes
condoes undoes rondos keynotes notes nudes endues bandies bendees sondes anodes sundews connotes randies denotes pandies duendes mondes tondos menudos endows nides shandies nodes condos cenotes sundaes maenades reendows kendos indues indows candies vendues vendees fondues undies indies lindies pintoes dandies mondos denudes monades dynodes maundies windows shindies
condo coned conidia connote conoid conto