19 entries under opening topic. ×

17
channel(noun, break, line, water, way)
16
pipe(noun, drain, means, route)
10
passage(noun, line, way, course)
5
drain(noun, fan, channel, off)
5
flue(noun, beam, fan, vent)
5
outlet(noun, place, release, escape)
4
spout(noun, break, drain, channel)
4
vent(noun, break, beam, passage)
2
exit(fan, passage, vent, outlet)
1
aperture(noun, fan, passage, vent)
1
avenue(line, way, means, trail)
1
chimney(noun, beam, fan, shaft)
1
hole(noun, break, beam, channel)
1
orifice(noun, fan, passage, vent)
0
escape(passage, vent, outlet)
0
exhaust
0
gap
0
split(fan, vent, outlet)
0
ventilator(fan, vent, outlet)
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APASmart Define. (2015). duct thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/duct/thesaurus/synonyms
ChicagoSmart Define. 2015. "duct thesaurus" https://smartdefine.org/duct/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, duct thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/duct/thesaurus/synonyms>.
MLASmart Define. "duct thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/duct/thesaurus/synonyms>