adj. 25B6; adjective
an extraordinary coincidence : REMARKABLE, exceptional, amazing, astonishing, astounding, sensational, stunning, incredible, unbelievable, phenomenal; striking, outstanding, momentous, impressive, singular, memorable, unforgettable, unique, noteworthy; out of the ordinary, unusual, uncommon, rare, surprising; informal fantastic, terrific, tremendous, stupendous, awesome; poetic/literary wondrous.
extraordinary speed : VERY GREAT, tremendous, enormous, immense, prodigious, stupendous, monumental; informal almighty.