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.
denari denarii denar denary dinar denier deanery donor diner tenor tenner tenour dinero dinner teener dunner downer tenure downier teenier
denari gnarr dinar denarii denar sonar senary scenario knar knaur nary near nori gnar binary canary coenuri kinara quinary linear lunar hymnary senarii snare zonary anear denary unary
den dean dene deni deny diene dona duenna etna deaden detain detainee