Synonyms|422Antonyms|2|Broader|18Narrower|9Related|100
4
main(opening, conduit)
4
pass
4
passageway(noun, opening, channel)
4
pipe(opening, method, conduit)
4
quarry(noun, verb, turn, produce, clean)
4
trough(noun, conduit)
4
warren(noun, hole)
3
canal(opening, conduit)
3
chimney(noun, opening, beam, rod, duct)
3
dent(challenge, weaken, concavity)
3
dig out(verb, expression, phrasal verb, hurt, ruin)
3
dike
3
dredge(verb, cut, turn, produce, clean)
3
drift(noun, passageway)
3
earth(noun, hole, warren)
3
flue(noun, opening, beam, rod, duct)
3
hollow out(verb, expression, phrasal verb, hurt, ruin)
3
hovel(noun, nature, break, cut, crack)
3
moat
3
perforate(verb, opening, sink, punch)
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APASmart Define. (2015). tunnel thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/tunnel/thesaurus/synonyms
ChicagoSmart Define. 2015. "tunnel thesaurus" https://smartdefine.org/tunnel/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, tunnel thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/tunnel/thesaurus/synonyms>.
MLASmart Define. "tunnel thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/tunnel/thesaurus/synonyms>