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.
tambour tamboura tambur tambura tumour tamer tumor timbre tamari timber tamarau tamarao timbery tomorrow timer damar demur dammar dammer demure dumber teemer daymare timarau
tambour amour humour rumour sambur tamboura tambur tambura tumour mor