"Skin-deepness" refers to the quality or characteristic of being superficial or shallow. There are various synonyms that can be used to express this concept, including "superficiality," "shallowness," "surface-level," "skin-deep," "surface quality," "outward appearance," and "facade." These words all convey the idea of something being superficial or lacking in depth. Synonyms for "skin-deepness" can be useful when describing people, relationships, or certain qualities that may only scratch the surface rather than truly penetrate deeply. It is important to choose the right synonym that conveys the intended meaning and context.