noun (n)

• the highest point of anything conceived of as growing or developing or unfolding(noun.event)

  Example:
  In the flood tide of his success.
  

  Synonym:
  climax
  

  source: wordnet30
• the occurrence of incoming water (between a low tide and the following high tide)(noun.event)

  Synonym:
  flood, rising tide
  Antonym:
  ebbtide
  

  source: wordnet30