This post provides a PowerShell script to import synonyms (labels) into a SharePoint term set using the PnP.PowerShell module. The sample using PnP PowerShell to import a csv file (same format you would use for import via UI for a term set but with an additional column for Synonyms delimited by |) Prerequisites Install the PnP.PowerShell module (run as an admin): Install-Module PnP.PowerShell -Scope CurrentUser An Azure AD app or other authentication method with sufficient permissions to manage taxonomy/term store, or use interactive Connect-PnPOnline.