coextensive

1 occupying the same space South Dakota's Todd County is coextensive with the Rosebud Sioux Reservation Synonyms coincident, coinciding, conterminous, coterminous Related Words allover, overlaying, superimposed, superposed, underlying; conjoining, crisscrossing, intersecting, overlapping; coaxial, concurrent, convergent; congruent, conjunctional Near Antonyms nonconcurrent, noncongruent

2 existing or occurring at the same period of time the golden age of Dutch culture was roughly coextensive with the Netherlands' reign as a world power Synonyms coetaneous, coeval, coexistent, coexisting, contemporary, coincident, coincidental, concurrent, contemporaneous, coterminous, simultaneous, synchronic, synchronousRelated Words accompanying, attendant, attending, concomitant, incidentAntonyms asynchronous, noncontemporary, nonsimultaneous, nonsynchronous