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.
gannet gaunt canned gunned cannot gained gahnite cant qanat caned canty canto quant quanta conned kenned gowned ganoid gunite kainit quaint canoed coigned connate connote cuneate kainite quinnat
bennet rennet jennet bannet sonnet bonnet sennet linnet punnet gannet net neat gunned tinned conned fanned canned vanned banned tanned panned wanned lunet sunned pinned genet nett ninety donned chinned quinnat shunned sinned wonned inned sennit binned pineta tunned punned newt minuet cannot dinned tenet manned winned penned denned nonet finned funned kenned dunned shinned ginned yenned
gan canna cannie canny gaen gain gane gaun goanna guan guanay guano gunny