Synonyms|4Antonyms|0|Broader|0Narrower|0Related|1
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elevated trains(noun, expression)
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metro
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rapid transit(noun, system)
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urban passenger transportation system(noun, expression, idiom)
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APASmart Define. (2013). underground train thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/underground_train/thesaurus/synonyms
ChicagoSmart Define. 2013. "underground train thesaurus" https://smartdefine.org/underground_train/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2013, underground train thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/underground_train/thesaurus/synonyms>.
MLASmart Define. "underground train thesaurus" 18 May 2013. Web. 21 September 2026. <https://smartdefine.org/underground_train/thesaurus/synonyms>