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.
gents genets gentes gentoos genettes giants jennets giantess jaunts joints juntas juntos
bents scents dents hents gents tents vents rents cents cants hunts rennets tenets sonnets quints quants peanuts aunts antsy mantas bunts nonets mantes knits quintas lunts fonts netts bentos rends vaunts rants vends daunts hints contes teentsy counts knots contos puntos nuts santos yentas shends chints chaunts wonts wants tints taints doughnuts dints joints sennets kainits lentos genets intis fiends bennets jaunts mints bends binits centas mantis montes snits minuets pointes pintos faints neats gannets gnats quintes bannets linnets bonnets mounts feints cantus points pantos pintas juntos hants haints paints punts cunts lints centos bionts haunts ants lends pends founts antis lunets antes antas nits saints juntas jennets pinots kentes fends bints pontes sends newts rentes nets pints runts pants qanats manats scends gentes ends giants punnets snots quinnats shunts shantis chiantis chants wends units tends sennits taunts dunts donuts cantos mends suints yentes
gent gentoo genet genette agenda agent