mature vs young

mature

young

noun
  • Offspring, especially the immature offspring of animals. 

verb
  • To become or seem to become younger. 

  • To exhibit younging. 

  • To cause to appear younger. 

adj
  • Of or belonging to the early part of life. 

  • Early. 

  • Youthful; having the look or qualities of a young person. 

  • In the early part of growth or life; born not long ago. 

  • At an early stage of existence or development; having recently come into existence. 

  • Junior (of two related people with the same name). 

  • advanced in age; (far towards or) at a specified stage of existence or age. 

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