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.
peals pals palsy pleas pails peles pawls palls pales peels palais please plus paellas pols pelisse puls polis pules plews poles pools polos pills piles polys plies polls pulis plows plays pulse pulls pilis pilus ploys palliasse palace pilaus pilaws polies poleis poilus pilous polios pileus palazzi palazzo pileous pillows pollees pulleys
veals wheals meals weals seals reals sheals zeals teals deals peals heals als els lease balls feels calls bawls fleas eels galleass calos coalas phials bels gaols bells else foals alls cauls gales goals gels ceils coals pals palls halls galeas bales talus mails hauls gals bialis deles alas sales mells fails veils tales tels wales riels koalas whales sells dials chiels wheels shauls sels dells sheols tails shoals yawls duels wauls knells quells salsa tells rials queleas teles hails mels rales dales nalas falls aals valse lalls kails teels bals pales kales kneels vales balas sails peels please malls dahls telos leas vials jells fells release heils sauls pails pleas helos quails peles koels hells vails bialys mauls keels ails balsa reales pawls heels ales hales galas jouals jails palsy noels cels cells sals ells rails also false delis nails rouleaus fuels duals baals bails halos mewls miauls males talas walls dals chelas galls wails wawls seels wells awls taels deils talls shales shawls dels shells reels shiels sials yells
peal pal spall pepla plea pial pele peel pawl paly pallia pally pall paleae palea pale pail paella opal spale spell