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Redmoon Calculators
Text analysis

Repeated Words / Echo Finder

Detect close-proximity repetition — the same word reused within a configurable window of N other words. An editor's tool for catching unintentional echoes.

Built and maintained by Paul Clark, Redmoon Software

When to use this

Use the repeated-words finder when editing fiction, essays, or any prose where close repetition reads as a stylistic mistake. Particularly powerful for technical writers who unconsciously reuse jargon.

How it compares

Word Frequency surfaces *what* is overused; Repeated Words surfaces *where* the repetition is too close. Use both when editing.

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How it works

The finder records every position of every content word in the text, then surfaces pairs of occurrences that fall within a configurable window (default 50 words).

It excludes function words (the, of, and) by default since they're expected to repeat constantly.

Results are sorted by closest distance — the word with the tightest repetition is on top.

FAQs

What's a good window size?

Default 50 words catches paragraph-level repeats. Use 20 for sentence-level only; 100 for page-level.

Why are short words excluded?

Short words are usually function words (the, of, and) that repeat constantly. Min length 4 filters them out by default.

Is some repetition okay?

Yes — for emphasis, parallelism, or anaphora. The tool flags candidates; you decide.

Worked example

Input

"The garden was beautiful. The garden bloomed early. The garden smelled sweet."

Output

"garden" used 3 times — closest pair just 4 words apart.

"Garden" is repeated within a tight window. A copy editor would diversify: "the plot", "the beds", "the borders".

Common pitfalls

  • Some repetition is deliberate — for emphasis, parallelism, or anaphora.
  • Window size is a heuristic — 50 words catches paragraph-level repeats; 20 catches sentence-level only.
  • Function words ("the", "and") repeat constantly; keep the stopword filter on.
  • Domain terms ("API", "database") often must repeat in technical docs — adjust expectations.

Proximity, not frequency

This tool looks for the same word recurring close together rather than for words that are common overall. That distinction is the point. A word used thirty times across a long document is usually invisible; the same word twice in one sentence is a stumble the reader notices, even when they could not say why.

Close repetition is one of the most reliable signals of a draft that has not been read aloud, and it is one of the easiest problems to fix once seen, which is a good ratio for an automated check.

Which repetitions to leave alone

Not every close repeat is a defect. Deliberate anaphora — repeating an opening word across successive clauses — is a rhetorical device. Technical terms must repeat, because substituting a synonym for a defined term introduces an ambiguity that reads as a different thing.

The repeats worth fixing are incidental: the same ordinary verb or adjective reused within a sentence or two by accident. Those are almost always improved by changing one of them, and almost never by changing both.

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