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.
decors decorous decares deckers decrees decries decrease decuries dikers dackers dekares duikers diggers doggers dockers dickers daggers duckers daikers degrees degrease doggeries takers tokers digress tackers taggers tickers tuckers tuggers daycares
cors mucors decors gores liquors coirs agoras fiacres vigors corse lycras cris cores macros nacres recurs rigours scores soucars sucres cooers micros gorse vigours gorsy koras kors curs vicars ecrus crus goers pakoras rigors scars scours sowcars acres lucres cars
decor decare decker decree decry decury