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.
peanut pant pent panto panty paint painty pantie pennate punt pend pint pinot punto panda pinto point pandy paned punty panada peened peined penned pinata pineta pointy punnet panned
peanut nut ant chaunt taunt tenuto donut taint saint snout rainout riant haunt quanta anti chant shanti panty pant minute meant quaint manat gaunt canto jaunt janty giant hant haint ante cant canty manta faint quant leant aunt banty panto paint minuet anta qanat knout vaunt rant runout santo daunt doughnut tanto tenuti want chanty chianti shanty
pean pan pen span piano peony penny paean pain pane panne pawn pawnee peen penni pennia pein peon penna pian pennae open penne spean