Wackiness refers to the state of being unconventional, eccentric, or bizarre. Its antonyms include seriousness, gravity, and sobriety. Seriousness refers to the quality of being grave and solemn, while gravity is the force that attracts any two bodies toward each other. Sobriety, on the other hand, indicates the lack of intoxication or the state of being clear-headed. Other antonyms of wackiness include sanity, normality, and rationality. Sanity implies the ability to think and behave normally, while normality means conforming to the standard or usual pattern. Rationality refers to the quality of being reasonable and logical.