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.
trains trans trainees terrains trines drains triens trienes triunes turions turns tarns terns taurines terrines terranes trannies trones tyrannies ternes treens tarriness tronas trance tyrannous tyrannise teariness durions durians truancy tureens terrenes tourneys terreens dourines trueness durns darns tyrannize tarriance drones drowns diurons dryness durance trounce dearness direness dourness
rains brains grains murrains terrains trains drains pyrans guaranas boranes puranas groans rinse piranas brins marinas furans currans mirins carrions prawns durians ruanas mureins lorans sciurines bairns neurines murines jarinas farinas firns yarns shorans shairns chorines urines trines trans tarns dourines sarins purins parians cranes burans brans terrines saurians morions learns heroins carinas serines morrions virions brawns sereins airns moraines kirns darns reearns sarans harianas roans karns groins prions rins furanes carns cairns earns birianis ranis merinos pereions reins barns purines serranos durions heroines guaranis bruins ruins marranos marines girns pirns brines serins taurines grins terranes burins grans triens turions warns chorions sharns shrines yearns
train trainee drain tranny triene triennia trine triune turion tyranny strain