8 entries under expensively topic. ×

6
extravagantly
5
exorbitantly(adverb, very, extremely, excessively)
4
outrageously
3
dearly
1
expensively
1
invaluably
1
richly
1
uneconomically
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APASmart Define. (2015). unreasonably thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unreasonably/thesaurus/synonyms
ChicagoSmart Define. 2015. "unreasonably thesaurus" https://smartdefine.org/unreasonably/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, unreasonably thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unreasonably/thesaurus/synonyms>.
MLASmart Define. "unreasonably thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/unreasonably/thesaurus/synonyms>