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.
spinneys spinnies spines supines spins spooneys soppiness sappiness soapiness spinous spinose sapiens spoonies sapience sapiency spans spawns speans spence spense spoons cioppinos
spinneys pannes pennies pinnies jeepneys openness spinnies spooneys
spinney spinny spin spine spiny supine