conterminous in WordNet English dictionary

1. having a common boundary or edge; abutting; touching
   "Rhode Island has two bordering states; Massachusetts and Conncecticut"; "the side of Germany conterminous with France"; "Utah and the contiguous state of Idaho"; "neighboring cities"
   adjacent  conterminous  contiguous  neighboring 
   
2. being of equal extent or scope or duration
   coextensive  coterminous  conterminous 
   
3. connecting without a break; within a common boundary
   "the 48 conterminous states"; "the contiguous 48 states"
   conterminous  contiguous