loon vs tomfool

loon

noun
  • A crazy or deranged person; a lunatic. 

  • A boy, a lad. 

  • Any of various birds, of the order Gaviiformes, of North America and Europe that dive for fish and have a short tail, webbed feet and a yodeling cry. 

  • An English soldier of an expeditionary army in Ireland. 

  • A simpleton. 

  • A harlot; mistress. 

tomfool

noun
  • a silly or stupid person, especially a boy or man. 

  • Any of various tyrant flycatchers viewed as foolishly confiding. 

verb
  • To act foolishly. 

adj
  • silly or stupid. 

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