10 entries under drain topic. ×

20
channel(noun, line, water, course)
12
conduit(noun, line, water, course)
8
trough(noun, depression, channel, conduit)
6
ditch(noun, course, channel, conduit)
6
gully(noun, flow, ditch, channel)
6
gutter(noun, flow, ditch, channel)
5
runnel(noun, current, flood, stream)
2
moat(noun, channel, conduit, rack)
1
dike(noun, bank, channel, barrier)
0
trench(noun, course, channel, rack)
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APASmart Define. (2015). watercourse thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/watercourse/thesaurus/synonyms
ChicagoSmart Define. 2015. "watercourse thesaurus" https://smartdefine.org/watercourse/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, watercourse thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/watercourse/thesaurus/synonyms>.
MLASmart Define. "watercourse thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/watercourse/thesaurus/synonyms>