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.
makos makes macks macs mogs mags mocs mikes micas mucks magus mokes mocks micks mucosa mucose megass macaws maquis mucous megasse mickeys moggies max magueys mucosae maxi megs mics migs moxa mugs mycs
makos shakos kos cuckoos kaiaks cakes sakes bakes leaks lakes quakes jakes gawks lakhs geckos auks tacos kakis kois koss koas knacks sacks rakis yacks wackos shakoes shacks packs shackoes whackos backs makes wakes sickos takes racks peaks dekkos wracks daks soukous jockos takas sakis quacks lacks fakes buckos hakus oaks hakes dawks bookoos jacks geckoes jauks macks kakas hacks buckoes cacaos rakes guacos haiks soaks sagos beaks wreaks tacks pekoes dagos hawks teaks wacks wauks rakus whacks shackos paiks shakes yaks