Core and Key

Core

Core noun - The seat of one's deepest thoughts and emotions.

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Key and core are semantically related in principal topic. In some cases you can use "Key" instead the word "Core" as an adjective or a noun, when it comes to topics like main, fundamental, basic, central.

Nearby Words: cored, coring

Key

Key noun - An explanatory list of the symbols on a map or chart.

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Synonyms for Key

Antonyms for Key

Core and key are semantically related in principal topic. Sometimes you can use "Core" instead the word "Key" as a noun or an adjective, if it concerns topics such as main, answer, fundamental, basic.

Nearby Words: keyed, keyboard, keying

Mutual synonyms

Related pairs

How words are described

old	old core	old key
special	special core	special key
normal	normal core	normal key
original	original core	original key
Other adjectives: true, proper, single, small, actual, real, large, main, ancient, new, glowing, hidden, last.

Both words in one sentence

Outgrown Such Silly Superstitions: A core theme of the book, and one of the key differences between the white Bond and the black antagonists.

Source: Literature / Live and Let Die
This is the core of a Key & Peele sketch in which a potentially-pardoned prisoner answers all the detective's questions based on what's in the room. Badly.

Source: Line-of-Sight Name
Moreover, the elaborate boiler startup sequence in Episode 2, with key-driven security interlocks and boiler core installation, implies that the engine's boiler is actually nuclear.

Source: Anime / Kabaneri Of The Iron Fortress

More sentences

Cite this Source

Key and Core. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/core/key

Core & Key. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/core/key>.

Key or Core. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/core/key.

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