Wonderful: Synonyms
amazing, astonishing, astounding, awesome, awful, eye-opening, fabulous, miraculous, portentous, prodigious, staggering, stunning, stupendous, sublime, surprising, marvelous, wondrous
Idiosyncratic: Synonyms
bizarre, cranky, curious, eccentric, erratic, freakish, odd, outlandish, peculiar, quaint, queer, quirky, singular, strange, unnatural, unusual, weird.