There are many synonyms for the phrase "amazing thing". Some common ones include "incredible feat", "remarkable achievement", "astounding accomplishment", and "extraordinary accomplishment". Other options might include "awe-inspiring performance", "mind-blowing outcome", "unbelievable result", or "jaw-dropping achievement". Each of these synonyms helps to paint a picture of something truly remarkable or impressive, whether it's a person's achievement, a technological breakthrough, or an awe-inspiring display of natural beauty. Whatever the context, these words serve to convey a sense of wonder and admiration for something truly amazing.