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.
roupet rouped roped repeat rapt raped repot riped wrapt rapped reaped repped repute ripped wrapped
roupet pet whippet tappet duped sippet rouped repeat puppet poppet pipet nepeta moppet louped lappet couped jauped poet peat souped tapeta tippet yauped
roup roupy trope drupe prop groupie group grope croupy croupe croppie croup crop rupiah rupee ropy ropey rope drop trop troupe