There aren't many different ways. I believe there are a few isolated compounds which have several correct names but on the whole a consistent system is followed and all compounds have standard names.
I'm aware of two ways. I don't know if there are more.
I'm aware of two ways. I don't know if there are more.
Two ways of what? In IUPAC nomenclature there is only one correct way to name each compound. Obviously some compounds have non-IUPAC, common use names, but they are not using the same system.