Call spade spade is an idiomatic expression that means to speak frankly and honestly, even if it may be difficult or uncomfortable. However, there are many instances where speaking tactfully and diplomatically may be more appropriate. In such cases, it may be helpful to use antonyms of "call spade spade" such as "sugarcoat," "mince words," "be diplomatic," "hold one's tongue," or "beat around the bush." By using these antonyms, one can communicate more effectively without offending or alienating others. It is important to remember that communication is not just about what is being said, but also about how it is being said. Choosing the right words and tone can make all the difference.