The word "broadest" refers to the widest or most extensive coverage of a particular topic or area. Synonyms for "broadest" include expansive, comprehensive, all-encompassing, far-reaching, widespread, extensive, broad-ranging, wide-ranging and extensive-ranging. Each of these words suggests a level of depth and scope that covers a large area or range of subjects. These synonyms can be used interchangeably to describe a wide variety of topics, from the broadest range of subjects to the broadest spectrum of opinions. Overall, the synonyms for "broadest" allow for a comprehensive description of a wide variety of topics and ideas.