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
Obstruction
Obstruction noun - Something that makes movement or progress difficult.
How words are described
Cite this Source
Obstruction and Opening. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/opening/obstruction
Opening & Obstruction. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/opening/obstruction>.
Obstruction or Opening. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/opening/obstruction.
Google Ngram Viewer shows how "opening" and "obstruction" have occurred on timeline