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.
glassies glasses glossies classes classis glosses galleasses galliasses glazes glaces glasshouse clauses galluses colessees gallowses coulisses closes glozes glacis glossas calices culices colossus calluses coleuses calloses cullises callouses gallicize calces clozes colzas
flossies glassies lassies glossies plisses classis palsies jealousies blesses lasses falsies lassis lassoes lessees loesses losses paillasses galliasses flosses glasses floosies coulisses glosses jalousies blisses molasses classes palliasses colessees pelisses galleasses plusses
glass glassie glassy class classy galas glias gloss glossa glossae glossy