adjective
1.
Synonyms: exceptional 1, extraordinary, rare, singular, uncommon, unimaginable, unique, unordinary, unthinkable, unwonted
Idioms: the exception rather than the rule
Antonyms: usual
2.
Synonyms: strange 4, bizarre, curious, eccentric, odd, oddball, outlandish, peculiar, quaint, singular
Antonyms: usual