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.
nullahs nulls nalas nills knells knolls nellies niellos nils nails noels noils nolos kneels
hallahs mullahs challahs fellahs zillahs mollahs nullahs wallahs selahs paellas hulloas chalahs fellas blahs halloas holloas challas moolahs hollas quillais hilloas mullas allays wallas villas scillas galahs ollas callas cullays chollas las