freak

[1]	freak out , gross out

[1]	monster , monstrosity , monster , monstrosity , lusus naturae , mutant , deformity
[2]	anomaly , addict , nut , rarity , abnormality , junkie , junky , irregularity , oddity , curiosity , rara avis , rare bird , (Brit) one-off , (Colloq) one-shot
[3]	whim , caprice , vagary , crotchet , quirk , eccentricity , fancy , idiosyncrasy , peculiarity
[4]	enthusiast , fan , devotee , aficionado , fanatic , addict , (Colloq) buff , fiend , nut

adj.

[1]	freakish , freaky , abnormal , anomalous , extraordinary , unique , rare , atypical , unusual , odd , queer , strange , exceptional , bizarre , weird , unparalleled , unforeseen , unexpected , unpredicted , unpredictable , (Brit) one-off , (Colloq) one-shot