Arch and Key

Arch

Arch adjective - Coming before all others in importance.

Usage example: since the start of her acting career her parents have steadfastly remained her arch supporters

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Key and arch are semantically related. In some cases you can use "Key" instead an adjective "Arch".

Nearby Words: arc, arched, archer, arching, archway

Key adjective - Coming before all others in importance.

Usage example: maintains that Sir Isaac Newton remains the key figure in physical science

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Arch and key are semantically related. Sometimes you can use "Arch" instead an adjective "Key".

Nearby Words: keyed, keyboard, keying

similar	similar arch	similar key
small	small arch	small key
large	large arch	large key
big	big arch	big key
Other adjectives: new, major, last, giant.

Cool Gate: Sigil is called "the City of Doors" for a reason: every single arch or similarly limited passageway may be a portal to somewhere—provided you hold the proper key.

Source: Video Game / Planescape: Torment
He has also hired Sparkster's arch-rival and Evil Counterpart, Axel Gear, to kidnap Princess Sherry and retrieve the key to the seal to unseal his ultimate weapon of destruction, the Pig Star.

Source: Video Game / Rocket Knight Adventures
A key in turn can be anything a person might be carrying or doing while passing through an arch, such as hum a melody.

Source: Video Game / Planescape: Torment

Cite this Source

Key and Arch. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/arch/key

Arch & Key. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/arch/key>.

Key or Arch. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/arch/key.

Google Ngram Viewer shows how "arch" and "key" have occurred on timeline