Index and Key

Similar meaning words

Index noun - An arrow-shaped piece on a dial or scale for registering information.

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Key is a synonym for index in thing topic. In some cases you can use "Key" instead a noun "Index", when it comes to topics like list, register.

Nearby Words: indexed, indexing, indexation, indexable

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

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Index is a synonym for key in thing topic. Sometimes you can use "Index" instead a noun "Key", if it concerns topics such as guide, answer.

Nearby Words: keyed, keyboard, keying

old	old index	old key
low	low index	low key
corresponding	corresponding index	corresponding key
specific	specific index	specific key
Other adjectives: right, certain, appropriate, separate, original, true, correct, single, actual, large, bad, main, new, hidden, extra, left, last, different, eponymous.

Even a basic Morse class teaches you to grasp the sides of the key button with thumb and middle finger and index finger on top, and work the key from your wrist.

Source: Everyone Knows Morse
Giftedly Bad: Komoe's singing and Index's self-harm is the key example for the show.

Source: Web Animation / Indexd
Hold the key between your thumb and index finger, much better for stabbing.

Source: Improvised Weapon / Real Life

Cite this Source

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

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

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

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