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.
seggars saggars sugars saggers saguaros scars scaurs skiers scares sakers cigars secures soakers sowcars soucars squares seekers sackers suckers scarious skerries scarce scores screes screws scries skirrs sucres scours secrecy squires
eggars seggars muggars beggars saggars gars loggers hoggers foggers cougars muggers keggers sugars saggers taggers ruggers jaggers niggers baggers daggers doggers tuggers chiggers diggers waggers gaurs joggers naggers gaggers laggers luggers aggers huggers eggers jiggers hegaris agars riggers cigars jaguars buggers guars aggros muggurs chuggers