open up vs sensitize

open up

verb
  • To reveal oneself; to share personal information about oneself; to become communicative. 

  • Synonym of cheat out (“to face or turn toward the audience more than would be natural”) 

  • To begin running, driving, travelling, etc., at maximum speed. 

  • To commence firing weapons. 

  • To rain. 

  • To open. 

  • To widen. 

sensitize

verb
  • To make (someone) increasingly aware of, in a concerned or sensitive way. 

  • To render capable of being acted on by actinic rays of light. 

  • To make (someone or something) sensitive or responsive to certain stimuli. 

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