uncommon
a stranger to
abnormal
atypical
breakaway
disaccustomed
extraordinary
ignorant
inexperienced
infrequent
irregular
new to
odd
offbeat
peculiar
rare
recherche
rusty
singular
strange
sui generis
unaccustomed
unacquainted with
unconventional
unconversant with
uncustomary
undreamed-of
unexpected
unfamiliar
unfamiliar with
unhabituated
unhardened
unheard-of
unimaginable
uninured
unique
unordinary
unorthodox
unpracticed
unprecedented
unseasoned
unthinkable
unthought-of
untrained
unused
astonish
feverish
habitual
indescribable
momentary
outward
uncharacteristic
undue
unearthly
unexampled
unnatural
unusual
utmost