Sewer
Vent
Vent noun - A hole for the escape of gas or air.
Both words in one sentence
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Navigating through the enemy's moat/sewer system/air vent and discovering something fascinating to move the plot along when the heroes could have avoided the place entirely.
Source: Right Under Their Noses -
His path takes him through both an Absurdly Spacious Sewer system and the the Air Vent system.
Source: Absurdly Spacious Sewer -
Steam Vent Obstacle: Blood II's obligatory sewer level consists near-entirely of finding switches to turn off a series of steam vents blocking you from crossing a bridge to the exit.
Source: Video Game / Blood
Cite this Source
Vent and Sewer. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/sewer/vent
Sewer & Vent. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/sewer/vent>.
Vent or Sewer. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/sewer/vent.
Google Ngram Viewer shows how "sewer" and "vent" have occurred on timeline