The root word does all of these words share is Graph which means writing.
What is the root word?
A word's root is its most fundamental component and lacks any prefixes or suffixes. It is a formed word that cannot be further subdivided. An English root word's meaning can be altered by the addition of prefixes and suffixes.
In the given words graphic, autograph, photography, telegraph, and phonograph have the root words as Graph. This word shows a complete word without the use of suffixes and prefixes.
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