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.
snide sonde sundew sundae send sand sned sienite snit scend saned snood sound synod senti sente sandy sinned signed seined sained seniti sanity sennet senate sonnet sennit sunned saunaed sinuate zenaida sent snot
nide snide auntie indie canid nite node hinnied anode nude bendee monied cnidae mannite pantie kainite ponied reunite ganoid nidi finite sundae denied duende dunnite tentie unde undue untie shinnied lenite cnida vauntie hypnoid coontie endue honied indue vendee vawntie vendue phonied sienite monde fondue conoid lianoid quinoid pinite gunite ranid gahnite sonde sundew denude dunite dynode tineid undee unite whinnied hyenoid