How can I match different forms of a word, such as run, running and runner?

Q: How can I match different forms of a word, such as run, running and runner?

List the word forms you want with the OR operator | . For example, run | running | runner matches any of those forms. This also helps with spelling variants and automatic-caption transcription differences, such as "mRNA" | "messenger RNA" | "messenger R.N.A." or "CO2" | "carbon dioxide" | "CO 2" . The documented search syntax does not provide a word-ending wildcard such as run* . Its * wildcard works inside a quoted phrase and stands for exactly one word. For example, "observed * decay" matches a word between "observed" and "decay". Use more asterisks for longer gaps, or combine alternatives: "basic * spectroscopy" | "basic * * spectroscopy" | "basic * * * spectroscopy" . Open the ? help icon beside the search box for the complete operator list and examples.

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Accepted Answer

The documented search syntax does not provide a word-ending wildcard such as run*. Its * wildcard works inside a quoted phrase and stands for exactly one word. For example, "observed * decay" matches a word between "observed" and "decay". Use more asterisks for longer gaps, or combine alternatives: "basic * spectroscopy" | "basic * * spectroscopy" | "basic * * * spectroscopy".

Open the ? help icon beside the search box for the complete operator list and examples.