Knothole
Opening
Opening noun - A place in a surface allowing passage into or through a thing.
Usage example: an opening in the roof is letting rain drip inside
Cite this Source
Opening and Knothole. (2016). Retrieved 2026, August 11, from https://thesaurus.plus/related/knothole/opening
Knothole & Opening. N.p., 2016. Web. 11 Aug. 2026. <https://thesaurus.plus/related/knothole/opening>.
Opening or Knothole. 2016. Accessed August 11, 2026. https://thesaurus.plus/related/knothole/opening.
Google Ngram Viewer shows how "knothole" and "opening" have occurred on timeline