lighten vs rubric

lighten

verb
  • To make brighter or clearer; to illuminate. 

  • To become light or lighter in weight. 

  • To become brighter or clearer; to brighten. 

  • To make less serious or more cheerful. 

  • To illuminate with knowledge; to enlighten. 

  • To descend; to light. 

  • To emit or disclose in, or as if in, lightning; to flash out, like lightning. 

  • To alleviate; to reduce the burden of. 

  • To become less serious or more cheerful. 

  • To make light or lighter in weight. 

rubric

verb
  • To adorn with red; to redden. 

  • To organise or classify into rubrics 

noun
  • A flourish after a signature. 

  • Red ochre. 

  • A set of scoring criteria for evaluating student work and for giving feedback. 

  • The directions for a religious service, formerly printed in red letters. 

  • A heading in a book highlighted in red. 

  • A title of a category or a class. 

  • An established rule or custom; a guideline. 

adj
  • Coloured or marked with red; placed in rubrics. 

  • Of or relating to the rubric or rubrics; rubrical. 

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