Synonyms|81Antonyms|0|Broader|1Narrower|0Related|28
9
tunnel(noun, channel, passageway)
7
subway
4
passage
3
passageway(noun, channel)
3
alley
3
channel
3
conduit
3
connection
3
ferry
3
metro
3
tube
3
underground
2
access
2
corridor
2
ford
1
aisle
1
covered way
1
defile
1
exit
1
gallery
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APASmart Define. (2015). underpass thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/underpass/thesaurus/synonyms
ChicagoSmart Define. 2015. "underpass thesaurus" https://smartdefine.org/underpass/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, underpass thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/underpass/thesaurus/synonyms>.
MLASmart Define. "underpass thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/underpass/thesaurus/synonyms>