The Entities plugin will automatically find company names, place names (in multiple languages!), numbers, or just unusual words that aren’t in the dictionary. Like all plugins, it’s available under Add View.
Overview’s entity detection algorithms are designed to err on the side of including things that aren’t entities, rather than missing things which are — unlike normal NLP techniques which often miss 50% of entities. You can hit the little red X’s to remove junk from the list.