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.
rooms roms roomies roams romeos rems rums rams rims rimes reams ramus rumbas rimous ramies remiss rimose rhymes ramose remise ramees ramous rummies
looms zooms booms dooms rooms oms tombs moose momes momus nomas nomos domes doums pomos poems bombs biomes vamoose soms ohms duomos tomes whomso bamboos toms comas noms moos combs comes coombs loams caeomas moms foams poms doms roms homos roams somas nomes pomes homes gnomes wombs
room roomie roomy rom roam romeo aroma brome bromo broom broomy from vroom groom prom promo