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.
jalopy jaloppy jalop jalap julep
jalopy lollopy lop wallop gallop sloppy collop slop glop saloop jaloppy plop kelpy jalop lollop gulpy clop elope floppy gloppy bloop loup loppy lope loopy loop galop flop pulpy sloop slope dollop shallop