An 'Opportunities' column will be displayed on the Analytics page for the Searches, Searches without Results, and Searches without Clicks tabs. This column is to expose pending AI Synonyms with a Confidence Score, to help you understand which synonyms may be useful. However, if you don't have AI Synonyms enabled, you won't be able to see suggestions.
You can disable this column by clicking on the 'Filter columns' button and deselecting 'Opportunities'.