built-in vs superficial

built-in

adj
  • Being an essential and permanent part of something. 

  • Being an included feature that normally comes as an extra. 

  • Constructed as a non-detachable part of a larger structure. 

noun
  • Anything (such as a piece of furniture, or a software feature) that is built in, not added as an extra. 

superficial

adj
  • Not thorough, deep, or complete; concerned only with the obvious or apparent. 

  • Lacking depth of character or understanding; lacking substance or significance. 

  • Existing, occurring, or located on the surface. 

  • Appearing to be true or real only until examined more closely. 

  • Situated or occurring on the skin or immediately beneath it. 

  • Two-dimensional; drawn on a flat surface. 

  • Denoting a quantity of a material expressed in terms of area covered rather than linear dimension or volume. 

noun
  • A surface detail. 

How often have the words built-in and superficial occurred in a corpus of books? (source: Google Ngram Viewer )