Misspellings
Misspellings are words that are commonly spelled wrong.
In Ecommerce Search if a word is registered as a misspelling of another word, then it will be replaced in any search query with the correctly spelled word.
The replacement happens before the search runs, so the corrected phrase is what products, content, suggestions and redirects are resolved against. The corrected phrase is reported as usedPhrase in the unified search response, and setting forceSearch skips the replacement.
Misspellings are created as a part of a misspelling dictionary.
Example
Assuming calender is registered as a misspelling of calendar.
Searching for kitten calender will show the results for kitten calendar.
Info
Misspellings only replace words in the search query, it does not fix spelling mistakes in the searchable texts.
Warning
Misspellings will make the word considered a misspelling unsearchable.
Don't try to use misspellings for other things than its intended usage.
Dictionary usage
A misspelling dictionary always applies to both the product index and the suggestion index. The usage choice offered for other dictionary types does not apply to misspelling dictionaries.
Effect on suggestions
In addition to replacing misspelled words in search queries, registered misspellings are also used to automatically filter suggestions. Any suggestion that matches a known misspelling will be excluded from suggestion search results, so that users only see correctly-spelled suggestions.
For details on the matching behavior, see Misspelling Filtering.