An element in a ring R with identity is said to be strongly nil clean if it is the sum of an idempotent and a nilpotent that commute, R is said to be strongly nil clean if every element of R is strongly nil clean. Let C.R/ be the center of a ring R and g.x/ be a fixed polynomial in C.R/OEx. Then R is said to be strongly g.x/-nil clean if every element in R is a sum of a nilpotent and a root of g.x/ that commute. In this paper, we give some relations between strongly nil clean rings and strongly g.x/-nil clean rings. Various basic properties of strongly g.x/ -nil cleans are proved and many examples are given.