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.
tenuous tenues tenuis tens tonus teens tense tauons tennis tenias teensy taenias tannoys tennies tans tuns tins dens tons tonneaus tunes tunas dinos tains denes tones tansy dense tines tynes towns toons deans dienes danios tineas tonnes tenace denies duennas tawneys tawnies toonies townees townies tunnies dueness
sinuous tenuous nous aeneous venous vinous heinous nouns ruinous sanious nos nus