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.
gantry gauntry gaunter canter cantor gander kantar country quainter quandary qintar candor contra candour cointer contour counter quintar keynoter
entry pantry country gantry sentry gauntry chantry gentry reentry wintry century hunter kantar chantor daunter foundry saunter renter centra sinter mentor minter canter vanitory quainter hinter monitory sundry quintar shunter chaunter notary gyniatry banter contra vaunter tinter bunter counter tantra tenter santir unitary santur taunter cointer monetary enter antre wintery reinter gaunter centre cantor haunter mounter sanitary wanter laundry antra minatory lientery intro winter linter reenter qintar painter punter venter jointer pointer nitery punitory mantra fainter ranter chanter inter center chunter yantra
cant canto canty gahnite gained gannet ganoid gaunt