Vietnam: vietnamm or vietnom? (names of nations can sometimes depend on the individual)
Mazda: mazzda or mawzda? (also a name, though)
Pasta: past-a or paw-sta?
Lana: lanna or lawna?(Names of people, places and things depend on how the person himself/herself pronounces it, like Rihanna pronunces her name as Rih-ANN-na, despite many thinking it's Rih-AWN-na.)
Macho: matcho or motcho?
Some words like Tomato also vary from person to person. I say To-MA-to, someone else may say To-MAW-to. Not all english words, but some. Sometimes you may also hear it differently due to the speaker's accent.