noun (n)

• creation by the physical union of male and female gametes; of sperm and ova in an animal or pollen and ovule in a plant(noun.event)

  Synonym:
  fecundation, fertilisation, impregnation
  

  source: wordnet30
• making fertile as by applying fertilizer or manure(noun.event)

  Synonym:
  dressing, fecundation, fertilisation
  

  source: wordnet30
• The act or process of rendering fertile.(noun)

  source: webster1913