The comparative form of the adjective “safe” is safer. More safe is a somewhat common alternative comparative form of safe While both forms are used, “safer” is more common and more acceptable. …
Although safer is commonly used more often in casual speaking, more safe is grammatically correct More safe is however, more commonly used in writing, rather than spoken.
Knowing some English phrases can make your trip safer and more fun, even if you’re not traveling to a place where English is the official language!