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.
treens tureens terreens triens trienes tarns turns trans terns terrenes trainees trueness trones ternes trains tronas trines turions triunes terrains taurines direness terrines terranes trannies tourneys darns durns tarriness tyrannous teariness tyrannies drones trance drains drowns durians durions trounce truancy diurons dryness dearness dourines dourness
boreens treens terreens tureens moreens careens preens greens pyrenes trainees brens kerns pereons querns gyrenes ferns serenes reins arenes trienes ranees phrensy barrens terrenes rouens sereins herns wyverns wrens mureins sirens erns terns arenas triens syrens warrens
treen triene triennia tureen strewn