78 entries under noun topic. ×

17
channel(break, line, water, way)
16
pipe(opening, drain, means, route)
15
conduit(line, way, course, drain)
13
canal(line, way, means, track)
10
passage(line, way, course, opening)
10
tube(line, way, drain, means)
9
aqueduct(line, way, means, track)
8
ditch
7
sewer(line, way, drain, means)
7
course(line, path, channel, conduit)
7
gutter(ditch, conduit, passageway for liquid)
7
line(way, trail, route, path)
7
main(line, course, means, route)
7
pipeline(course, channel, passage, cylinder)
6
trough(line, depression, course, drain)
5
culvert(ditch, conduit)
5
drain(opening, fan, channel, off)
5
flue(opening, beam, fan, vent)
5
outlet(place, release, escape, opening)
5
shaft(something, vent, tunnel, chimney)
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APASmart Define. (2015). duct thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/duct/thesaurus/synonyms
ChicagoSmart Define. 2015. "duct thesaurus" https://smartdefine.org/duct/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, duct thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/duct/thesaurus/synonyms>.
MLASmart Define. "duct thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/duct/thesaurus/synonyms>