brother vs uncle

brother

noun
  • Son of the same parents as another person. 

  • A form of address to a man. 

  • Someone who is a peer, whether male or female. 

  • A male fellow member of a religious community, church, trades union etc. 

  • A male having at least one parent in common with another (see half-brother, stepbrother). 

  • Somebody, usually male, connected by a common cause, situation, or affection. 

  • A black male. 

  • Someone who is a kinsman or shares the same patriarch. 

verb
  • To treat as a brother. 

intj
  • Expressing exasperation. 

uncle

noun
  • The male cousin of one’s parent. 

  • A source of advice, encouragement, or help. 

  • Used as a fictive kinship title for a close male friend of one's parent or parents. 

  • The brother or brother-in-law of one’s parent. 

  • Used as a title for the male companion to one's (usually unmarried) parent. 

  • An affectionate term for a man of an older generation than oneself, especially a friend of one's parents, by means of fictive kin. 

  • Any middle-aged or elderly man older than the speaker and/or listener. 

intj
  • A cry used to indicate surrender. 

verb
  • To act like, or as, an uncle. 

  • To address somebody by the term uncle. 

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