83 entries under noun topic. ×

18
burrow(verb, nature, animal, break)
17
hole(verb, nature, opening, beam)
13
mine(verb, hurt, ruin, destroy)
13
den(nature, break, cut, crack)
12
dig(verb, hurt, ruin, destroy)
11
shaft(break, cut, line, crack)
10
adit(opening, conduit, access, passageway)
8
cave
8
channel(verb, turn, produce, clean)
8
passage(opening, conduit, passageway)
8
tube(opening, conduit, passageway, hose)
8
underpass(expression, passageway, ffgg)
7
gouge(verb, cut, turn, produce)
7
subway
6
gallery
6
pit(verb, break, turn, produce)
6
scoop(verb, break, cut, turn)
5
lair(break, cut, crack, opening)
4
conduit(course, means, race, beam)
4
ditch
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APASmart Define. (2015). tunnel thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/tunnel/thesaurus/synonyms
ChicagoSmart Define. 2015. "tunnel thesaurus" https://smartdefine.org/tunnel/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, tunnel thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/tunnel/thesaurus/synonyms>.
MLASmart Define. "tunnel thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/tunnel/thesaurus/synonyms>