The word "mis tier" generally refers to someone who is not performing at the expected level in their job or profession. There are many antonyms for this term that can convey a different meaning altogether. For instance, "expert," "skilled," and "experienced" are all antonyms for "mis tier." These words would suggest that the person is highly trained, knowledgeable, and capable of performing their job duties well. Other antonyms include "proficient," "competent," and "adept," which all hint at the idea of someone who is highly skilled and capable. Overall, antonyms for "mis tier" offer a positive alternative and indicate a high level of skill and expertise in a particular field.