remarkable
out of the common
unwontedly
rare as hen's teeth
different
antrin
atypical
unusual
unusualness
unusuality
offbeat
out of the way
uncommon
quaint
strange
peculiarity
distinctive feature
distinguishing characteristic
unique
exotic
fremd
uncommonly
freakish
geason
peculiar
weird
mutant
queer as a clockwork orange
extraordinary
unwonted
rare as a four-leaf clover
normal for Norfolk
oddment
seld
unorthodox
oddly
way-out
unaccustomed
superabnormal
freaky
peculiarsome
isanomal
one in a million
ultrarare
idiosyncratic
something else
untypical
periplectic
sporadic
shenanigans