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.
botanise botanize botanies butanes biotins boutons betonies betaines betons batons butenes boudins battens badness buttons bedouins battiness bawdiness beadiness bittiness
botanise tetanise danios botanies botanize cutinise litanies ratanies dittanies tetanies tetanize titanias
botany botonee botonnee butane