The word "needfulnesses" is quite uncommon, and finding its synonyms can be a challenging task. However, some alternatives to this word include "necessities," "requirements," "essentialities," "requisites," "essentials," "must-haves," "imperatives," "obligations," "musts," "demandments," "desiderata," and "prerequisites." These words convey the same meaning as "needfulnesses" - things that are essential or required for a certain outcome or purpose. By using these synonyms, one can avoid using a complicated and not widely known term and communicate their ideas more effectively.