lexicon vs speller

lexicon

noun
  • The vocabulary used by or known to an individual. (Also called lexical knowledge.) 

  • A dictionary of Classical Greek, Hebrew, Latin, or Aramaic. 

  • The lexicology of a programming language. (Usually called lexical structure.) 

  • A set of vocabulary specific to a certain subject. 

  • Any dictionary. 

  • A list thereof. 

  • A dictionary that includes or focuses on lexemes. 

  • The vocabulary of a language. 

speller

noun
  • A book used to learn how to spell properly. 

  • A person who spells. 

  • A spell checker. 

  • A participant in a spelling bee. 

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