indicative vs valid

indicative

adj
  • serving as a sign, indication or suggestion of something 

  • of, or relating to the indicative mood 

noun
  • The indicative mood. 

  • A term in the indicative mood. 

valid

adj
  • Well grounded or justifiable, pertinent. 

  • Of an argument: whose conclusion is always true whenever its premises are true. 

  • Genuine - as distinguished from efficient or regular - sacrament. 

  • Related to the current topic, or presented within context, relevant. 

  • Of a formula or system: such that it evaluates to true regardless of the input values. 

  • Acceptable, proper or correct; in accordance with the rules. 

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