The word "unlikest" means uncommon, rare, or unusual. One synonym word for the word "unlikest" is "different," meaning that something is not the same as another thing. Another synonym for "unlikest" is "distinct," which means that the thing or object has characteristics that set it apart from others. "Unique" is another synonym for "unlikest," where it means something that is one of a kind and cannot be replicated. A fourth synonym for "unlikest" is "out of the ordinary," which is used to describe things that are unusual, rare, and not typical. Lastly, "exceptional" can also be a synonym for "unlikest," because it indicates that something is outstanding and better than the norm.