Duct
Duct noun - A long hollow cylinder for carrying a substance (as a liquid or gas).
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Synonyms for Duct
Vent is a synonym for duct in pipe topic. In some cases you can use "Vent" instead a noun "Duct", when it comes to topics like air passage.
Vent
Vent noun - A hole for the escape of gas or air.
Duct is a synonym for vent in outlet topic. You can use "Duct" instead a noun "Vent", if it concerns topics such as air passage.
Mutual synonyms
How words are described
Both words in one sentence
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Sam and Max, and Sam's granny Ruth, try to reach the prison warden this way in the Sam & Max: Freelance Police episode "Christmas, Bloody Christmas" — only, instead of the air vent, they go through the prison's water duct, and end up in the shower room.
Source: Air-Vent Passageway -
He successfully fired a bullet through an air vent from the roof of a neighboring building, and hit the (unseen) target by ricocheting the bullet off the air duct's metal covering.
Source: Series / Alphas - Played with in Eight Legged Freaks, when a character narrowly escapes the giant spiders by diving into a rooftop air duct into a mall's ventilation shafts... only to slide helplessly down a slanted vent, then get trapped when the grill at the bottom won't come loose.
Source: Air-Vent Passageway
Cite this Source
Vent and Duct. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/duct/vent
Duct & Vent. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/duct/vent>.
Vent or Duct. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/duct/vent.
Google Ngram Viewer shows how "duct" and "vent" have occurred on timeline