| quarry(noun, mine, pit) | |
| scratch(noun, depression, hollow, scrape, indentation) | |
| till | |
| tunnel(noun, conduit) | |
| kennel(conduit, furrow) | |
| penstock | |
| public treasury(noun, expression, idiom) | |
| sewer(noun, course, drain, means, flow) | |
| sluice(noun, drain, race, ditch, stream) | |
| adit(noun, conduit) | |
| alveolus | |
| arroyo | |
| burrow(noun, mine, pit, quarry) | |
| concave | |
| dado(noun, groove) | |
| dell(noun, gorge, vale) | |
| dig | |
| dimple(depression, dip, hollow, bottom, scrape) | |
| dint(depression, hollow, scrape, indentation, chip) | |
| drain(noun, race, ditch, channel, pit) |
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| APA | Smart Define. (2015). trough thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/trough/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "trough thesaurus" https://smartdefine.org/trough/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, trough thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/trough/thesaurus/synonyms>. |
| MLA | Smart Define. "trough thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/trough/thesaurus/synonyms> |