high water vs hightide

high water

noun
  • The state of the tide when the water is at its highest. 

  • The highest stage of a river. 

  • The location of high tide on a coastal area. 

hightide

noun
  • The point at which the sea level is at its highest during any given cycle 

  • A great festival. 

How often have the words high water and hightide occurred in a corpus of books? (source: Google Ngram Viewer )