22 entries under line topic. ×

15
subway(noun, thing, track, hole)
12
conduit(noun, thing, way, drain)
11
channel(noun, water, way, course)
10
metro(noun, track, underground, railway)
8
duct(noun, way, course, drain)
5
canal(noun, way, opening, drain)
4
passage(noun, way, course, opening)
4
railroad(noun, track)
2
elevated railway(noun, expression, track, railway)
2
monorail(noun, track, railway, subway)
2
rail(noun, track)
2
rail line(noun, expression, track, railway)
2
railway(noun, track, subway)
2
sewer(noun, way, course, drain)
2
streetcar line(noun, expression, track, railway)
2
track(noun, way, trail, route)
2
trolley line(noun, expression, track, railway)
1
route(noun, way, course, means)
1
tracks(noun, track, railway, subway)
1
train line(noun, expression, track, railway)
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APASmart Define. (2015). tube thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/tube/thesaurus/synonyms
ChicagoSmart Define. 2015. "tube thesaurus" https://smartdefine.org/tube/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, tube thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/tube/thesaurus/synonyms>.
MLASmart Define. "tube thesaurus" 5 June 2015. Web. 20 September 2026. <https://smartdefine.org/tube/thesaurus/synonyms>