| metro(noun, line, track, underground, railway) | |
| underground(noun, adjective, railroad) | |
| tube(noun, line, track, hole, channel) | |
| underpass | |
| train(journey, railroad) | |
| underground railroad(noun, expression, idiom, network) | |
| underground railway(noun, expression, idiom, line, track) | |
| tunnel(noun, opening, gap, channel, pipe) | |
| railroad(noun, line, track) | |
| railway(noun, line, track) | |
| burrow(noun, channel, passageway) | |
| subway system | |
| automobile | |
| express | |
| hole(noun, channel, passageway) | |
| airplane | |
| autobus | |
| bus | |
| cave | |
| chute(noun, railroad) |
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| APA | Smart Define. (2015). subway thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/subway/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "subway thesaurus" https://smartdefine.org/subway/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, subway thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/subway/thesaurus/synonyms>. |
| MLA | Smart Define. "subway thesaurus" 18 December 2015. Web. 20 September 2026. <https://smartdefine.org/subway/thesaurus/synonyms> |