noun (n)

• the property of producing abundantly and sustaining vigorous and luxuriant growth(noun.attribute)

  Example:
  Weeds lovely in their rankness.
  

  Synonym:
  fertility, prolificacy, richness
  

  source: wordnet30
• the attribute of having a strong offensive smell(noun.attribute)

  Synonym:
  fetidness, foulness, malodorousness, stinkiness
  

  source: wordnet30
• The condition or quality of being rank.(noun)

  source: webster1913