3
good-looking(great, excellent, superb, super, groovy)
3
graceful(great, excellent, superb, super, groovy)
3
gratifying(great, excellent, superb, super, groovy)
3
hopeless
3
imaginative(great, excellent, superb, super, groovy)
3
impracticable(adjective, possible)
3
impressive(great, excellent, superb, super, groovy)
3
incomprehensible
3
ingenious(great, excellent, superb, super, groovy)
3
irresistible(great, excellent, superb, super, groovy)
3
keen(great, excellent, superb, super, groovy)
3
lavish(great, excellent, superb, super, groovy)
3
ludicrous
3
lush(great, excellent, superb, super, groovy)
3
luxuriant(great, excellent, superb, super, groovy)
3
magnificent(great, excellent, superb, super, groovy)
3
one's liking(great, excellent, superb, super, groovy)
3
one's taste(great, excellent, superb, super, groovy)
3
out of the question(expression, adjective, idiom, unusual, unreasonable)
3
outrageous
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APASmart Define. (2015). unthinkable thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unthinkable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unthinkable thesaurus" https://smartdefine.org/unthinkable/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, unthinkable thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unthinkable/thesaurus/synonyms>.
MLASmart Define. "unthinkable thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/unthinkable/thesaurus/synonyms>