" coextensive "

1: occupying the same space;

  * e.g., " ... South Dakota's Todd County is coextensive with the Rosebud Sioux Reservation "

•  Synonyms : 

•  coincident,

•  coinciding,

•  conterminous,

•  coterminous

•  Antonyms : 

•  asynchronous,

•  noncontemporary,

•  nonsimultaneous,

•  nonsynchronous

2: existing or occurring at the same period of time;

  * e.g., " ... the golden age of Dutch culture was roughly coextensive with the Netherlands' reign as a world power "

•  Synonyms : 

•  coetaneous,

•  coeval,

•  coexistent,

•  coexisting,

•  coincident,

•  coincidental,

•  concurrent,

•  contemporaneous,

•  contemporary,

•  coterminous,

•  simultaneous,

•  synchronic,

•  synchronous

•  Antonyms : 

• (N/A)