belligerent vs unfriendly

belligerent

noun
  • A state or other armed participant in warfare 

adj
  • Eager to go to war, warlike. 

  • Engaged in warfare, warring. 

  • Of or pertaining to war. 

  • Uncooperative. 

  • Aggressively hostile, eager to fight. 

  • Acting violently towards others. 

unfriendly

noun
  • An enemy. 

adj
  • Not friendly; hostile; mean. 

  • Unfavourable. 

adv
  • in an unkind or unfriendly manner; not as a friend 

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