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.
serranos sarans serins sereins serenes serines cernuous saurians sorns sorriness sarins sirens syrens soreness sureness
marranos serranos sarans brawns saurians pyrans puranas pornos brans merinos guaranas lorans grans roans boranes brains drains terrains trains uranous parians burans pyranose groans burnous furanose furans journos cranes currans furanes grains guaranis ranis murrains piranas prawns rains durians terranes trans shorans