Ducts
Openings
Both words in one sentence
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A smart villain would have smaller air ducts, post guards around the openings or line their ducts with barbed wire and broken glass.
Source: Air-Vent Passageway -
Exception; Titans Tower's quarantine lock-down system apparently does seal off openings to the air ducts, as seen in the episode "Haunted".
Source: Air-Vent Passageway -
Spacecraft/station designers in this universe seem to love including tons of three-foot-square ventilation ducts, many of which lead to ceiling openings.
Source: Vertical Kidnapping
Cite this Source
Openings and Ducts. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/ducts/openings
Ducts & Openings. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/ducts/openings>.
Openings or Ducts. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/ducts/openings.
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