Key and Useful

Related words

mutual synonyms sentence examples

Key

Key adjective - Coming before all others in importance.
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Synonyms for Key
Antonyms for Key
Useful and key are semantically related. In some cases you can use "Useful" instead an adjective "Key".
Nearby Words: keyed, keyboard, keying

Useful

Useful adjective - Capable of being put to use or account.
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Synonyms for Useful
Antonyms for Useful
Key and useful are semantically related. Sometimes you can use "Key" instead an adjective "Useful".
Nearby Words: use, useless, used, usefulness, usefully

Mutual synonyms

Both words in one sentence

  • He finally makes himself useful in the second-to-last episode of Season 3, where he's the key to defeating the Physical God Big Bad.
    Source: Deus Exit Machina
  • Useless Protagonist The First-Person Peripheral Narrator isn't the most key player, but can still be useful, often as the Sidekick.
    Source: Useless Protagonist
  • It's low-key looking even compared to the other non-lethal weapons like the PEPS or tranquilizer rifle, but incredibly useful besides.
    Source: Boring But Practical / Videogames
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Cite this Source
Useful and Key. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/key/useful
Key & Useful. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/key/useful>.
Useful or Key. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/key/useful.

Synonyms for key


Synonyms for useful

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