least vs maximum

least

noun
  • Something of the smallest possible extent; an indivisible unit. 

adv
  • Used for forming superlatives of adjectives, especially those that do not form the superlative by adding -est. 

  • In the smallest or lowest degree; in a degree below all others. 

prep
  • At least. 

  • What a stupid white privileged POS I am! Least I call myself out. 

  • 2019 December, Justin Blackburn, The Bisexual Christian Suburban Failure Enlightening Bipolar Blues, page 79 

det
  • The most little; the smallest amount or quantity of something. 

maximum

noun
  • The highest limit. 

  • A scoring shot for 6 runs. 

  • The greatest value of a set or other mathematical structure, especially the global maximum or a local maximum of a function. 

  • A 147 break; the highest possible break. 

  • A score of 180 with three darts. 

  • An upper bound of a set which is also an element of that set. 

  • The largest value of a batch or sample or the upper bound of a probability distribution. 

adj
  • To the highest degree. 

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