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.
shrewd shred shrewdie shored shared sheered sheared shirred shard sherd chared shroud shaird chored shortie churred choired charred chaired cheered chirred choreoid chard shirt short chord shirty shorty charade choroid sheroot tiaraed chorioid
shrewd red gyred worried rued jereed knarred dured erred whirred tiered mired wared teared ferried rared toured whored aeried uredo jarred queried pored fared marred redo caried reread sored loured reed read fried geared haired herried cored gored sered buried dreed parried pared cried choired wearied chared treed cheered cered sheared zeroed shirred sired shred tiaraed preed churred oread brede cured juried deaired curried pureed quarried laired rede credo trued hurried varied wried harried mured tarred nereid barred redd whirried aired lured birred cared reared peered breed charred faired freed ired veered heired carried tyred neared wherried poured waired jeered gnarred dried burred wired soared tarried bread leered feared purred tired teredo married berried garred eared queered tried dared curred pried seared greed bored moored jerreed hired furred bared hared cred fired crowd oared parred bred shared quired creed chirred warred chored chaired roared tread paired soured sheered serried shored dread tared foredo yirred
shrew share sharia shariah shear sheer sherry shier shire shirr shoer shore shri usher