abnormal
alphabet
atypical
background
banner
case
choice
comparison
condition
data
discover
disease
distinctive
event
exceptional
extraordinary
extreme
few
found
grass
green
happening
incomparable
information
infrequent
letter
occasional
outstanding
possibility
rare
rate
record
remarkable
scarce
singular
situation
special
sporadic
status
strange
superb
uncommon
unequal
unique
unlikely
unusual
very
word