95 entries under fantastic topic. ×

14
prodigious(adjective, extraordinary, wonderful, marvelous)
14
stupendous(adjective, wonderful, amazing, marvelous)
10
sensational(adjective, cool, moving, excellent, extraordinary)
10
striking(adjective, extraordinary, awful, unusual, terrible)
8
magnificent(adjective, great, excellent, awful, terrible)
8
outstanding(adjective, great, excellent, extraordinary, unusual)
7
brilliant(adjective, great, excellent, superb, marvelous)
7
exceptional(adjective, extraordinary, unusual, strange, outstanding)
6
enjoyable(adjective, cool, great, excellent, superb)
6
exciting(adjective, extraordinary, wonderful, stirring)
6
eye-catching(remarkable, striking, impressive, stunning)
6
far-out(adjective, moving, lively, wonderful, exceptional)
6
fine(adjective, great, moving, excellent, lively)
6
pleasant(adjective, cool, great, excellent, superb)
6
swell(adjective, cool, great, excellent, superb)
6
terrific(adjective, great, excellent, unusual, strange)
5
pleasing(adjective, great, excellent, superb, marvelous)
5
strange(adjective, extraordinary, unusual, superb, exceptional)
3
superb(adjective, cool, great, excellent, extraordinary)
3
thrilling(adjective, moving, extraordinary, lively, wonderful)
11 years ago|16k views|share |citing 
APASmart Define. (2015). astonishing thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/astonishing/thesaurus/synonyms
ChicagoSmart Define. 2015. "astonishing thesaurus" https://smartdefine.org/astonishing/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, astonishing thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/astonishing/thesaurus/synonyms>.
MLASmart Define. "astonishing thesaurus" 10 April 2015. Web. 1 October 2026. <https://smartdefine.org/astonishing/thesaurus/synonyms>