"Nontrespasser" is a rather obscure term that refers to someone who does not illegally enter or cross a property without permission. While the word has a specific meaning, there are several synonyms that can be used interchangeably. Some of the most commonly used synonyms for "nontrespasser" include "law-abiding individual," "respectful visitor," "lawful entrant," and "authorized user." Other synonyms for the term include "lawful occupier," "permitted visitor," and "licensed user." All of these terms refer to someone who properly respects the boundaries of a property and follows all rules and regulations when entering or using it.