The word "more spanning" can be replaced by a variety of synonyms, depending on the context. For example, if you're looking for a word that means "covering a larger area," you could use "encompassing," "engulfing," or "surrounding." If you're looking for a word that means "extending over a longer period of time," you could use "prolonged," "lengthy," or "expanded." Other possible synonyms for "more spanning" might include "wider-reaching," "far-reaching," or "comprehensive." Ultimately, the best synonym will depend on the specific meaning and tone you're trying to convey in your writing.