solitary
adj
1 desolate, hidden, isolated, lonely, out-of-the-way, remote, retired, secluded, sequestered, unfrequented, unvisited
2 alone, lone, single, sole
3 cloistered, companionless, friendless, hermitical, lonely, lonesome, reclusive, unsociable, unsocial
n
4 hermit, introvert, loner (informal) lone wolf, recluse
Antonyms
, adj
1 bustling, busy, frequented, public, well-frequented
3 companionable, convivial, cordial, gregarious, outgoing, sociable, social
n extrovert, mixer, socialite