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.
crease creasy creese grease cruse crews corse cures cress cries crass carse curse cares craws cores course crosse caress crouse caries cruise coarse cressy greasy curies cuirass curries corries carouse cowries carries cars cors curs crus cris curassow carassow koras crows greys grass gorse croze craze grues carrs currs grees coirs gores crazy cross grays kersey grassy coerce curacy crissa cooers grouse curios kyries coryza quires carious curiosa curious gurries kauries kerrias kerries quaeres queries quarries
crease urease grease bears wrasse reuse resew coarse resee foresee phrase gyrase hoarse pears boreas nears praise prese reraise dears tears urase hears raise bureaus whereas shears lears creese areas eras erase greasy rase creasy fears fraise verse hearse ears gears carse choreas wears arse braise marse parse perse prase rears sears hydrase terse ureas years
care core craw crew cure acre ocrea ocreae recarry wreaker scree screw screwy