awful vs hellacious

awful

adj
  • Very bad. 

  • Exceedingly great; usually applied intensively. 

adv
  • Very, extremely. 

  • Awfully; dreadfully; terribly. 

hellacious

adj
  • horrible, awful, hellish, agonizing 

  • nasty, repellent. 

  • Remarkable, unbelievable, unusual. 

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