noun (n)

• something added to food primarily for the savor it imparts(noun.food)

  Synonym:
  flavorer, flavoring, flavourer, flavouring, seasoner
  

  source: wordnet30
• the act of adding a seasoning to food(noun.act)

  source: wordnet30
• The act or process by which anything is seasoned.(noun)

  source: webster1913