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.
mucosa mucosae mucous mucose mucus mucks moxa mocs mycs macs mogs mugs mics macks magus mocks makos micks mokes micas muggs macaws maquis magueys mickeys moggies muggees max
mucosa cos cosy coss coos cacaos cocoas cogs cows guacos locoes coys mucosae mucous rugosa sickos decoys tacos whackos shackos locos boocoos coxa coax buckos fucose fucous geckos jockos jocose ficoes jucos cocos casa mucose raucous scows decos dioicous wackos chicos shicksa