For this guide we will use OpenLyrics. You can also try ESLyric.
Adding OpenLyrics
Download the OpenLyrics component.
Open
Foobar > File > Preferencesor click CTRL + P.
Go to Components and click Install.

Select the downloaded OpenLyrics component file and open. Then click Apply to load it and OK to restart the app.

Then go to
Tools > OpenLyrics > Searching. Click on Musixmatch in Available sources. Then << to move it in the main section. Then select Musixmatch again and click UP to the top 3. Click Apply.
Go to
Tools > OpenLyrics > Searching > Musixmatch. Click ? and then Yes. Hit Apply.
Go to
Tools > OpenLyrics > Searching > Metadata tags. Set LYRICS as value for both Unsynced and Synced lyrics
Go to
Foobar > View > OpenLyrics Panel
Now play any song and the panel will show synced lyrics (if it's in the database)

details More Settings
Saving synced lyrics as metadata
Go to Tools > OpenLyrics > Saving and set Save method as Save to tag

Tip
You can also select multiple song and set synced lyrics for all of them by going to Right click > OpenLyrics > Search for Lyrics

