noun (n)

• the creation of something in the mind(noun.cognition)

  Synonym:
  conception, design, excogitation, innovation
  

  source: wordnet30
• a creation (a new device or process) resulting from study and experimentation(noun.artifact)

  Synonym:
  innovation
  

  source: wordnet30
• the act of inventing(noun.act)

  source: wordnet30
• The act of finding out or inventing; contrivance or construction of that which has not before existed; as, the invention of logarithms; the invention of the art of printing.(noun)

  source: webster1913