final vs least

final

adj
  • Word-final; occurring at the end of a word. 

  • Respecting an end or object to be gained; respecting the purpose or ultimate end in view. 

  • Conclusive; decisive. 

  • Last; ultimate. 

  • Expressing purpose; as in the term final clause. 

noun
  • The last round, game or match in a contest, after which the winner is determined. 

  • A final examination; a test or examination given at the end of a term or class; the test that concludes a class. 

  • A final examination taken at the end of the final year of an undergraduate course, which contributes towards a student's degree classification. 

  • The tonic or keynote of a Gregorian mode, and hence the final note of any conventional melody played in that mode. 

  • The final part of a syllable, the combination of medial and rime in phonetics and phonology. 

least

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

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 

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. 

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

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