80 entries under unreasonable topic. ×

2
overindulgent(adjective, extravagant, excessive, unwarranted)
2
profligate(adjective, extravagant, extra, excessive)
2
self-indulgent(extravagant, excessive, unwarranted, unrestrained)
2
super(extravagant, excessive, unwarranted, very)
2
superfluous(adjective, spare, useless, extravagant)
2
supernatural(extravagant, excessive, unwarranted, very)
2
unbridled(adjective, extravagant, excessive, unwarranted)
2
uncontrolled(adjective, extravagant, excessive, unwarranted)
2
unjust(adjective, hard, tough, harsh, rude)
2
wasteful(adjective, extravagant, ridiculous, excessive)
2
way out(expression, improper, extravagant, senseless)
1
absonant(adjective, improper, stiff, extravagant)
1
dissipated(extravagant, excessive, unwarranted, very)
1
dizzying(adjective, high, extravagant, extra)
1
exacting(adjective, harsh, cruel, extravagant)
1
extra(spare, extravagant, excessive, unwarranted)
1
foolish(adjective, strange, stupid, crazy)
1
highway robbery(expression, adjective, extravagant, ridiculous)
1
limitless(extravagant, excessive, unwarranted, very)
1
ludicrous(adjective, strange, stupid, crazy)
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APASmart Define. (2016). extreme thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/extreme/thesaurus/synonyms
ChicagoSmart Define. 2016. "extreme thesaurus" https://smartdefine.org/extreme/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, extreme thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/extreme/thesaurus/synonyms>.
MLASmart Define. "extreme thesaurus" 11 March 2016. Web. 29 September 2026. <https://smartdefine.org/extreme/thesaurus/synonyms>