55 entries under defense topic. ×

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munition
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revetment
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safeguard
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safety
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sandbag
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sangar
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screen
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shelter
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stoccado
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sunk fence(expression, idiom)
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trench
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vallation
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vallum
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vanfos
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wall dead wall(expression, idiom)
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APASmart Define. (2015). portcullis thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/portcullis/thesaurus/synonyms
ChicagoSmart Define. 2015. "portcullis thesaurus" https://smartdefine.org/portcullis/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, portcullis thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/portcullis/thesaurus/synonyms>.
MLASmart Define. "portcullis thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/portcullis/thesaurus/synonyms>