"HC BUT" is a commonly used phrase that signifies a contradictory statement or a deviation from a previous statement. Synonyms for this expression include 'however', 'yet', 'still', 'nevertheless', 'nonetheless', and 'on the other hand'. These terms all convey a similar meaning of introducing an opposing or contrasting idea. By using alternative phrases, writers and speakers can add variety and depth to their language, making their arguments or narratives more engaging. It is essential to understand the context and usage of these synonyms to effectively communicate the intended meaning and maintain coherence in the discourse.