The phrase "more hohum" is used to describe something that is boring or unexciting. However, there are several antonyms for this phrase that can be used to describe the opposite. Some of these antonyms include exciting, thrilling, lively, interesting, fascinating, captivating and engaging. When something is exciting, it stimulates and arouses the interest of the person experiencing it. It brings out an adrenaline rush and leaves a lasting impression. Similarly, when something is thrilling, it gives a sense of excitement and anticipation. So, instead of describing something as "more hohum", it is better to use one of these antonyms to add color and vibrancy to your sentence.