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.
megs megass mags mugs migs mogs megasse mikes miggs muggs makes magus mokes muggees mickeys moggies magueys mocs macs mics mycs makos micas micks mocks moxie mucks mucus macks
begs kegs legs megs negs pegs regs segs tegs