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.
mentor monitor minatory monitory mantra mender minter meander mintier montero mounter monetary minder maunder minuter
cantor mentor chantor minatory jointer pantry vaunter cointer canter gentry gantry mantra chaunter inter hunter counter haunter venter quintar daunter hinter country shunter intro tantra wanter tenter monitor mounter punitory sentry ranter qintar reentry renter santir santour saunter centra contour wintry fainter banter linter genitor antre sinter center vendor donator condor vanitory centre kantar gaunter janitor gauntry entry bunter enter santur candor contra reinter antra reenter senator painter pointer quainter minter santoor tinter punter winter chanter monitory chantry taunter chunter yantra
menta mentee omened ament maenad manta manteau mantua meant mehndi menad mend menudo mint minty monte amend amenity emend omenta