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.
creese crease cores crews cares cress cries cures curse carse grees cruse corse creasy cruise course coarse curies caress crouse grease caries crosse cressy curries corries cowries carouse carries cris crus cars curs cors craws crows gorse craze currs gores croze grues coirs greys cross crass carrs coerce grouse cooers kersey crissa kyries curios quires queers greasy quaeres kerries kauries curious curiosa cuirass carious queries gurries carassow curassow quarries
creese resee grease resew reuse hirees bourrees brees beers purees seres prees sarees sirrees peres deers meres terse larees urease quaeres cheers crease rees feres perse breeze haeres verse heres freeze frees veers prese seers ceres foresee sirees peers soirees leers drees queers trees grees wheres jeers sheers
care core crew cure gree acre ocrea ocreae reeker reekier scree screw screwy cheekier