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.
bettor better batter butter betray beater bitter battery buttery battier bittier batterie biter bider boater budder beader bidder bedder baiter badder bawdier beadier bootery boudoir
quittor bettor tor sautoir sitter litter foetor rotter putter better torr knitter petter tetter ritter utter latter retore suitor natter nutter motor fetter shutter chitter wetter totter dotter story batter bitter butter faitour fatter whitter matter otter hitter getter jotter cotter gator quitter viator attar vetoer phatter tory hatter jitter gutter tora toro letter hotter reutter cottar fetor cutter lotter tore tour rotor stour tori fitter store vetter patter setter knotter netter ratter meteor potter ottar tatter satori tutor mutter watter whetter detour chatter shatter titter yatter
betta bet butty butte butt bott bitty bitt beet beta beat batty battue battu batteau batt abet