alone
antisocial
asocial
lone
lonely
recluse
reclusive
solitary
withdrawn
aloof
anchoretic
anchoritic
autistic
bashful
chilly
close
cold
cool
detached
dissociable
distant
hermitical
hostile
incompatible
inhospitable
insociable
misanthropic
mopey
mopish
morose
nongregarious
reserved
retiring
self-contained
self-sufficient
snug
socially incompatible
standoffish
sullen
unamiable
unclubbable
uncommunicative
uncompanionable
uncongenial
unfriendly
ungenial
unsociable
absent-minded
altruistic
discourteous
distrustful
ill-natured
inartistic
indisposed
irreligious
misanthropical
miserly
moody
narrow-minded
penurious
self-centred
snappish
spirit
supersensitive
unambitious
uncharitable
unchristian
unstatesmanlike