go-ahead vs permit

go-ahead

noun
  • Approval, agreement, or instruction to begin or proceed. 

adj
  • Progressive; exerting leadership. 

  • Being a score which gives the scoring team or player the lead in the game. 

  • Dashing; energetic. 

permit

noun
  • A learner's permit. 

  • A pompano of the species Trachinotus falcatus. 

  • An artifact or document rendering something allowed or legal. 

verb
  • To allow (something) to happen, to give permission for. 

  • To allow for, to make something possible. 

  • To allow, to admit (of). 

  • To grant formal authorization for (something). 

  • To attempt to obtain or succeed in obtaining formal authorization for (something). 

  • To allow (someone) to do something; to give permission to. 

How often have the words go-ahead and permit occurred in a corpus of books? (source: Google Ngram Viewer )