Arm
Arm noun - A part of a body of water that extends beyond the general shoreline.
Usage example: this arm of the Atlantic is surprisingly peaceful, as the stronger ocean currents do not reach this far
Harbor
Harbor noun - A part of a body of water protected and deep enough to be a place of safety for ships.
Usage example: the tanker stayed in Boston harbor three days to undergo repairs
Arm and harbor are semantically related in place for storing boats in the water topic. Sometimes you can use "Arm" instead a noun "Harbor".
Both words in one sentence
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If 47 (or anyone else) tries to bring him to justice, he'll arm it, potentially engulfing the entire harbor in an atomic blast.
Source: Video Game / Hitman - If Boris gets wise to your presence he'll arm his nuke and split in a car, turning the harbor to ashes.
Source: Video Game / Hitman -
It was a steal at £100,000, and a Russian squadron in Lisbon harbor kindly "donated" all their cannons to arm it.
Cite this Source
Harbor and Arm. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/arm/harbor
Arm & Harbor. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/arm/harbor>.
Harbor or Arm. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/arm/harbor.
Google Ngram Viewer shows how "arm" and "harbor" have occurred on timeline