That's interesting, what accent do you have? In American English I've only ever heard them pronounced the same in noun or verb form.

For me english is mostly a written language, as I speak it very rarely. I think that I speak with a mix of french and spanish accents, incorrectly stressing the last syllables of many words, and pronouncing different vowels using the same sound.

Check out the wikipedia page on initial-stress derived nouns. [1] It's quite illuminating!

1. https://en.wikipedia.org/wiki/Initial-stress-derived_noun