unprecedented (adj.)
- beguiling
- enigmatic
- exceptional
- extraordinary
- fabulous
- fantastic
- fascinating
- incomprehensible
- inconceivable
- incredible
- indescribable
- ineffable
- legendary
- marvelous
- miraculous
- mythical
- noteworthy
- outlandish
- phenomenal
- portentous
- primary
- prodigious
- prototypal
- puzzling
- rare
- remarkable
- sensational
- strange
- striking
- stupefying
- stupendous
- unexampled
- unheard-of
- unimaginable
- unique
- unparalleled
- unspeakable
- wonderful
- wondrous
