83 entries under noun topic. ×

2
couch(hole, warren)
2
covert
2
crawlway(channel, passageway)
2
hollow
2
puncture(verb, break, cut, crack)
2
rod(beam, shaft)
2
shelter(nature, break, cut, crack)
2
tap
1
catacomb
1
cavity
1
crawl space(expression, channel, passageway)
1
crosscut
1
flagpole
1
gap
1
hole in the wall(expression, idiom, channel, passageway)
1
nest
1
post
1
retreat(break, cut, crack, opening)
1
staff
1
stalk
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APASmart Define. (2015). tunnel thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/tunnel/thesaurus/synonyms
ChicagoSmart Define. 2015. "tunnel thesaurus" https://smartdefine.org/tunnel/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, tunnel thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/tunnel/thesaurus/synonyms>.
MLASmart Define. "tunnel thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/tunnel/thesaurus/synonyms>