Is there a fear of oxymoron's?

Yes, there is a term called "oxymoronophobia," which refers to an irrational fear of oxymorons—phrases that combine contradictory terms, like "deafening silence" or "bittersweet." While it's not a widely recognized or common phobia, it can reflect a broader discomfort with contradictions and complexity in language. People with this fear might struggle with understanding or accepting ideas that don't fit into clear categories.