95 entries under fantastic topic. ×

1
dynamite(adjective, great, superb, wonderful, marvelous)
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excellent(adjective, cool, keen, swell, extraordinary)
1
extravagant(adjective, excellent, superb, wonderful, marvelous)
1
far-fetched(extraordinary, marvelous, amazing, incredible)
1
fictitious(adjective, excellent, superb, wonderful, marvelous)
1
first-class(adjective, excellent, extraordinary, superb, wonderful)
1
greatest(adjective, cool, extraordinary, superb, wonderful)
1
immense(adjective, excellent, superb, wonderful, marvelous)
1
legendary(adjective, excellent, superb, wonderful, marvelous)
1
odd(adjective, extraordinary, unusual, strange, wonderful)
1
out-of-sight(adjective, excellent, superb, wonderful, marvelous)
1
out-of-this-world(adjective, excellent, extraordinary, unusual, superb)
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outlandish(extraordinary, marvelous, amazing, odd)
1
peachy(adjective, cool, superb, wonderful, marvelous)
1
primo(adjective, excellent, extraordinary, superb, wonderful)
1
queer(adjective, extraordinary, unusual, wonderful, exceptional)
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rad(adjective, excellent, superb, wonderful, marvelous)
1
something else(expression, adjective, awful, terrible, superb)
1
too much(expression, adjective, great, extraordinary, superb)
1
top drawer(expression, adjective, superb, wonderful, marvelous)
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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>