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.
digs dugs dags dogs dikes dagos degas dicks taigas dagoes daggas doggies degauss dickeys duckies dickies tics togs dioicous docs tags tegs tugs daks tikis dukes dawks decos dykes dexie dekes decks teggs ticks tikes docks togas ducks doxie
bigs figs vigs gigs jigs migs pigs rigs cigs zigs digs whigs wigs