For those who dont understand the difference, a lot of english speaking people say it as if you had the cra part from lucrative and then an s sound and after that the word ant. So it sounds like this cra-s-ant(not totally but its hard to describe in a way that someone without ipa knowledge would understand). While the actual french pronounciation is like(once again quite hard to describe) kwah-sah(the sah is kinda like when you pronounce balsa) and the important part is that theres a release of air from the nostrils when pronouncing the sah part, almost like if the a and an n merged. This is often written with a tilda(~) written on top of the vowel(ã in this case) which literally comes from and n that was shoved on top of the preceeding vowel.