Synonyms for Amazing (same or very similar meaning)
WordNet sense 1 (surprising greatly):
astonishingWordNet sense 2 (causing surprise or wonder or amazement):
surprisingWordNet sense 3 (inspiring awe or admiration or wonder):
awe-inspiring, awesome, awful, awingWordNet sense 4 (making a strong or vivid impression):
impressiveFrom the ODE community, based on WordNetadd/edit