(a.) Equally extensive; having equal extent; as, consciousness and knowledge are coextensive.

aligned analogous coequal coextending coincident coincidental coinciding collateral concurrent congruent correspondent corresponding coterminous equal equidistant equispaced equivalent even lined up nonconvergent nondivergent parallel parallelepipedal parallelinervate paralleling parallelodrome parallelogrammatic parallelogrammic parallelotropic synonymous