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How to Fix Word for Mac Thesaurus Not Showing Synonyms

WPS EditorWPS Editor Oct 9, 2026 870 views

Question details

The user is unable to view synonyms when control-clicking a word or opening the Thesaurus pane in specific documents, despite the feature working correctly in other files.

How to Fix Word for Mac Thesaurus Not Showing Synonyms
Product
Microsoft Word for Mac
Device & OS
macOS
Scenario
Attempting to use the Thesaurus feature to find synonyms for selected words while editing a document.
Observed behavior
Synonyms fail to display in the context menu or Thesaurus pane for certain documents. The pane may open, but no alternative words are suggested.
Before you start

Before troubleshooting, ensure that your Mac is connected to the internet, as some Office dictionary features require an active connection, and verify that the document is not locked for editing by another user.

Solution 1Recommended

Set and Apply the Correct Proofing Language

The most common reason for missing synonyms is that the text is assigned to a language not supported by your installed Thesaurus dictionary. Applying a consistent, supported language resolves this.

Microsoft Word relies on the document's assigned proofing language to generate synonyms. If the text was pasted from another source or inadvertently set to a language without a dictionary installed, the Thesaurus will return blank results.

1
Select all text

Click anywhere inside your document and press Cmd + A on your keyboard to highlight all the text in the file.

2
Open Language settings

Navigate to the top menu bar, click on 'Tools', and select 'Language' from the dropdown menu.

3
Assign a supported language

In the Language dialog box, select your preferred language (e.g., English (US)). Ensure that the box for 'Do not check spelling or grammar' is unchecked, then click OK.

Set and Apply the Correct Proofing Language
Check the Thesaurus Pane Again: Once the correct language is applied to the entire document, control-click a word and select 'Synonyms' to confirm the feature is working properly.
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Frequently Asked Questions

Why does the Thesaurus work in some Word documents but not others?

This usually happens because proofing languages are saved at the document or text level. If a specific document is formatted with a language that lacks an installed dictionary on your Mac, the Thesaurus will not display synonyms for that file.

Why is the Thesaurus option completely grayed out in the context menu?

The Thesaurus option may be grayed out if the document is in a protected view, set to read-only, or if no valid text is currently selected. You must be in an active editing mode to access it.

Can I add new synonym dictionaries to Word for Mac?

Yes, you can add new proofing tools by going to the 'Tools' > 'Language' menu. Selecting a new language will prompt Office to use the respective dictionary, provided it is supported and installed with your Office package.