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.
trapt trapped trippet dript dropt draped torpid trepid tripod torpedo tripody tripped trooped trouped
rapt wrapt bewrapt rewrapt trapt erupt irrupt carpet corrupt crept crypt gript parapet periapt dript dropt
trap drape drapey tarp trip tripe trippy trop trope strap strappy