HMS vs IJN

HMS

noun
  • IJN: Synonym of HIJMS (ship of Imperial Japan's navy) 

  • SMS: Synonym of HIGMS (ship of the German Second Reich's navy) 

  • Synonym of HNoMS (ship of Norway's Royal Navy) 

  • Synonym of HNLMS (ship of Holland's Royal Navy) 

  • Synonym of HDMS (ship of Denmark's Royal Navy) 

  • Synonym of HSwMS (ship of Sweden's Royal Navy) 

  • Synonym of HICMS (ship of the Empire of China's navy) (Ching/Qing Dynasty) 

  • Synonym of HIFMS (ship of the French Second Empire's navy) 

  • Synonym of HTMS (ship of Thailand's Royal Navy) 

  • Synonym of HIRMS (ship of Czarist Russia's navy) 

IJN

noun
  • Imperial Japanese Navy ship, informal ship prefix used for a warship of the Imperial Japanese Navy, usually in reference to WWII. 

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