Synonyms|13Antonyms|0|Broader|2Narrower|6Related|161
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attack submarine
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auxiliary research submarine
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fleet ballistic missile submarine
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nautilus
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nuclear-powered submarine
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nuclear submarine
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APASmart Define. (2013). u-boat thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/u-boat/thesaurus/narrower
ChicagoSmart Define. 2013. "u-boat thesaurus" https://smartdefine.org/u-boat/thesaurus/narrower (accessed September 24, 2026).
HarvardSmart Define 2013, u-boat thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/u-boat/thesaurus/narrower>.
MLASmart Define. "u-boat thesaurus" 17 June 2013. Web. 24 September 2026. <https://smartdefine.org/u-boat/thesaurus/narrower>