The word "ricketiness" implies instability, wobbliness, or shakiness. Its antonyms could be words such as stability, solidity, firmness, strength, or robustness. These words connote a sense of steadiness and reliability, making them excellent qualities to describe well-built structures or systems. The opposite of ricketiness is often desirable when it comes to things like furniture or buildings, where stability and security are crucial. By using antonyms such as these, we can better communicate our intentions and ideas, creating a clearer and more precise picture of what we want to convey.