The Oxford Thesaurus An A-Z Dictionary of Synonyms - abnormaladj.

1) deviant, deviating, irregular, unusual, unconventional, aberrant, Psych jargon exceptional: The wing of a bat is an abnormal structure. 2) peculiar, unusual, odd, strange, queer, freakish, unnatural, extraordinary, weird, eccentric, bizarre, anomalous, aberrant, perverse, deviant, irregular, Colloq offbeat, Slang oddball, kinky, weirdo: They certainly make the contestants on that TV show do some very abnormal things.