What about the word "insane"? Is it okay to use that? Also, what's the rule on using "paranoid" in a non-clinical context? Can I use "schizophrenic" and "narcis

What about the word "insane"? Is it okay to use that? Also, what's the rule on using "paranoid" in a non-clinical context? Can I use "schizophrenic" and "narcissistic" and "borderline" colloquially, or is that also offensive? I just want to make sure I'm following the rules and not offending anybody.