8 entries under expensively topic. ×

7
exorbitantly(adverb, superfluously)
7
richly
6
expensively(adverb, wastefully)
6
unreasonably
5
outrageously(adverb, superfluously)
2
uneconomically
1
dearly
1
invaluably
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APASmart Define. (2015). extravagantly thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/extravagantly/thesaurus/synonyms
ChicagoSmart Define. 2015. "extravagantly thesaurus" https://smartdefine.org/extravagantly/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, extravagantly thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/extravagantly/thesaurus/synonyms>.
MLASmart Define. "extravagantly thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/extravagantly/thesaurus/synonyms>