Synonyms|5Antonyms|0|Broader|0Narrower|0Related|2
0
subterranean
0
tunnel
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APASmart Define. (2015). underground passage thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/underground_passage/thesaurus/related
ChicagoSmart Define. 2015. "underground passage thesaurus" https://smartdefine.org/underground_passage/thesaurus/related (accessed September 28, 2026).
HarvardSmart Define 2015, underground passage thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/underground_passage/thesaurus/related>.
MLASmart Define. "underground passage thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/underground_passage/thesaurus/related>