80 entries under steep topic. ×

7
unrestrained(adjective, extreme, grand, extravagant, generous)
7
expensive(adjective, extreme, ridiculous, excessive, expensive)
7
implausible(adjective, hard, poor, difficult, thin)
6
costly(adjective, fancy, high, excessive, expensive)
6
dear(adjective, fancy, extreme, high, extravagant)
6
enormous(adjective, extreme, extra, ridiculous, excessive)
6
exaggerated(adjective, hard, severe, difficult, harsh)
6
high(adjective, fancy, ridiculous, excessive, expensive)
6
imprudent(adjective, weak, simple, severe, harsh)
5
fanciful(adjective, careless, unstable, chance, impulsive)
5
high-priced(adjective, fancy, high, expensive, exclusive)
5
inflated(adjective, ridiculous, excessive, expensive)
5
invaluable(adjective, fancy, high, extravagant, lavish)
5
lavish(adjective, fancy, high, extravagant, generous)
5
stiff(adjective, fancy, extreme, high, extravagant)
4
fantastic(adjective, weak, simple, silly, foolish)
4
overmuch(adjective, extreme, extravagant, extra, ridiculous)
4
pricey(adjective, fancy, extreme, high, extravagant)
4
uneconomical(adjective, fancy, high, extravagant, lavish)
3
absonant(adjective, extreme, improper, stiff, extravagant)
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APASmart Define. (2015). unreasonable thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/unreasonable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unreasonable thesaurus" https://smartdefine.org/unreasonable/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, unreasonable thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/unreasonable/thesaurus/synonyms>.
MLASmart Define. "unreasonable thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/unreasonable/thesaurus/synonyms>