adj. 25B6; adjective
isolated communities : REMOTE, out of the way, outlying, off the beaten track, secluded, lonely, in the back of beyond, godforsaken, inaccessible, cut-off; N. Amer. in the backwoods, lonesome; Austral./NZ in the backblocks, in the booay; informal in the middle of nowhere, in the sticks; N. Amer. informal jerkwater, in the tall timbers; Austral./NZ informal Barcoo, beyond the black stump; archaic unapproachable.
he lived a very isolated existence : SOLITARY, lonely, companionless, friendless; secluded, cloistered, segregated, unsociable, reclusive, hermitic; N. Amer. lonesome.
an isolated incident : UNIQUE, lone, solitary; unusual, uncommon, exceptional, anomalous, abnormal, untypical, freak; informal one-off.
accessible, sociable, common.