main vs upper

main

adj
  • Of chief or leading importance; prime, principal. 

  • Big; angry. 

  • Chief, most important, or principal in extent, size, or strength; consisting of the largest part. 

  • Belonging to or connected with the principal mast in a vessel. 

verb
  • To mainly play a specific character or side, or with specific equipment, during a game. 

noun
  • That which is chief or principal; the chief or main portion; the bulk, the greater part, gross. 

  • The primary character that one plays in a video game in which one can play more than one character. 

  • The high seas. 

  • A large cable or pipe providing utility service to an area or a building, such as a water main or electric main. 

  • A banker's shovel for coins. 

adv
  • Exceedingly, extremely, greatly, mightily, very, very much. 

upper

adj
  • At a higher level, rank or position. 

  • Of or pertaining to a secondary school. 

  • younger, more recent 

  • Situated on higher ground, further inland, or more northerly. 

noun
  • A denture or retainer for the teeth in the upper jaw. 

  • The piece of leather, etc., that forms the top part of a shoe above the sole. 

  • An upper berth or bunk. 

  • That which is higher, contrasted with the lower. 

  • A stimulant, such as amphetamine, that increases energy and decreases appetite. 

  • The upper portion of something 

  • Someone with higher social standing 

  • A spiritual passageway through which consciousness can reach a higher dimension. 

  • A senior student. 

  • A tooth in the upper jaw. 

  • The Y-shaped strap on flip-flops. 

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