enlist vs mobilize

enlist

verb
  • To voluntarily join a cause or organization, especially military service. 

  • To recruit the aid or membership of others. 

  • To enter on a list; to enroll; to register. 

  • To secure; to obtain. 

noun
  • One who is enlisted, usually in a military service. 

mobilize

verb
  • To assemble troops and their equipment in a coordinated fashion so as to be ready for war. 

  • To get ready for war. 

  • To make something mobile. 

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