atypical
I
adjective
aberrant, abnormal, anomalous, dissimilar, diverse, exceptional, never the same, nonuniform, unalike, unrepresentative, variable
II
index
anomalous, deviant, different, disordered, disparate, dissimilar, infrequent, irregular (not usual), notable, noteworthy, peculiar (distinctive), special, unique, unusual
Burton's Legal Thesaurus.
William C. Burton.
2006