Fantasticly is an adverb that indicates something extraordinary, amazing, or impressive. There are several synonyms for this word that can be used interchangeably, depending on the context of the sentence. Some of these synonyms include splendidly, superbly, amazingly, extraordinary, incredibly, wonderfully, astonishingly, and phenomenally. These words convey a similar meaning to fantasticly and can be used when describing a remarkable accomplishment, a breathtaking view, an incredible performance, or an outstanding achievement. Using synonyms for fantasticly can help to add variety to your writing or to expand your vocabulary.