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.
galop gallop glop gloppy clop gulp calliope gulpy kalpa collop calipee callipee clap clip kelp
jalop galop lop alp wallop kalpa slope loop flop lope salp loup salep bloop palpi elope sloop lollopy jalap palp collop plop gallop saloop glop salpa jalopy slop lollop dollop clop shallop
gal gall egal goalie goal glow gayly gaol gally galley galeae calo galea gale galah gala gaily aglow igloo