Nonpublic and Own

Nonpublic adjective - Not known or meant to be known by the general populace.

Own and nonpublic are semantically related. in personal topic. In some cases you can use "Own" instead an adjective "Nonpublic".

Own adjective - Belonging to or on behalf of a specified person (especially yourself); preceded by a possessive.

Nonpublic and own are semantically related. Sometimes you can use "Nonpublic" instead an adjective "Own".