2
portcullis
2
ravine
2
roadblock
2
safeguard(noun, defense)
2
screen(noun, defense)
2
shelter(noun, defense)
2
sunk fence(expression, idiom, defense)
2
tunnel
2
watercourse(noun, drain, channel, conduit, rack)
2
waterway(noun, drain, ditch, channel, pit)
2
weir
1
abyss
1
cut(drain, ditch, channel, pit, trench)
1
dam
1
aorta
1
approach trench
1
arch dam
1
argument(noun, defense)
1
armor(noun, defense)
1
artery
11 years ago|5.3k views|share |citing 
APASmart Define. (2015). moat thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/moat/thesaurus/synonyms
ChicagoSmart Define. 2015. "moat thesaurus" https://smartdefine.org/moat/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, moat thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/moat/thesaurus/synonyms>.
MLASmart Define. "moat thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/moat/thesaurus/synonyms>