only vs though

only

conj
  • Under the condition that; but. 

  • But; except. 

adj
  • Alone in a category. 

  • Singularly superior; the best. 

  • Without sibling; without a sibling of the same gender. 

adv
  • As recently as. 

  • Without others or anything further; exclusively. 

  • Used to express surprise or consternation at an action. 

  • Introduces a disappointing or surprising outcome that renders futile something previously mentioned. 

  • No more than; just. 

noun
  • An only child. 

though

conj
  • Despite the fact that; although. 

adv
  • Used to intensify statements or questions; indeed. 

  • Despite that; however. 

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