One synonym for "more nucleus" is "greater core." Another possibility is "expanded center." These synonyms suggest greater importance or prominence of the core or center of something. Other options might include "enhanced hub," "amplified focus," or "reinforced heart." Each of these phrases implies a central element that is strengthened or expanded in some way, highlighting its significance. Such synonyms could be used in a variety of contexts, from describing the organization of an atom to discussing the focus of a business strategy. Ultimately, the use of such language could help to convey a sense of purpose and direction.