inroad vs loot

inroad

noun
  • An advance into enemy territory, an attempted invasion; an encroachment, an incursion. 

  • Often followed by in, into, or on: initial progress made toward accomplishing a goal or solving a problem. 

loot

noun
  • Synonym of booty, goods seized from an enemy by violence, particularly (historical) during the sacking of a town in war or (video games) after successful combat. 

  • A scoop used to remove scum from brine pans in saltworks. 

  • Any valuable thing received for free, especially Christmas presents. 

  • Synonym of money. 

  • Synonym of sack, the plundering of a city, particularly during war. 

verb
  • Synonym of rob, to steal something from someone by violence or threat of violence. 

  • Synonym of plunder, to seize by violence particularly during the capture of a city during war or (video games) after successful combat. 

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