Nucleate is a scientific term that refers to the formation of a nucleus or the process of forming a core structure. There are several alternative terms that can be used to describe this concept. The words "initiate," "activate," "commence," and "trigger" can all be used to refer to the beginning of a process or the creation of a central point. Other alternatives include "seed," "originate," "generate," and "establish." Each of these words can be used to convey the idea of a starting point or the development of a central structure, depending on the context in which they are used.