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.
rotche rotch rouche retch ratch roach ruche rechew wretch rich reach roshi reecho reechy reshoe rushee
rotche cache vetch dutch pitch gauche butch etch itch fiche hotch botchy latch louche bouchee hatch fitchew miche quiche hoochie lichee eche witch touche tache ditch notch fitch patch techie niche seiche natch fetch retch catchy botch gouache ruche mache ratch rechew litchi match mutch fitchy hitch chew lychee letch ache aitch catch itchy bitch boche gotcha pitchy tach vouchee quitch hutch hootch nitchie wretch ketch rouche cutch rotch batch nautch datcha tetchy bitchy patchy fitchee nuchae douche tech watch witchy