lexicalize

/ˈlɛksɪkəˌlaɪz/
verb
  1. To make a word or phrase part of a language's vocabulary, or to express something as a single word or fixed expression.
    • The committee voted to lexicalize the acronym 'LOL' as an official word.
    • Languages often lexicalize new concepts by borrowing words from other languages.
    • The dictionary decided to lexicalize the term 'binge-watch' after its widespread use.