104 entries under costly topic. ×

29
precious(adjective, excellent, value, important, exceptional)
26
priceless(adjective, good, great, excellent, fine)
26
valuable(adjective, fancy, excellent, sensible, value)
16
dear(adjective, fancy, important, useful, high)
14
expensive(adjective, important, useful, valuable, rare)
9
helpful(adjective, strong, sensible, important, useful)
9
inestimable(adjective, value, important, useful, valuable)
8
worthy(adjective, excellent, sensible, value, important)
6
high-priced(adjective, fancy, important, useful, high)
6
rich(adjective, exceptional, extravagant, valuable, lavish)
6
extravagant(adjective, fancy, high, lavish, expensive)
6
worthwhile(adjective, excellent, honest, sensible, important)
5
serviceable(adjective, friendly, sensible, important, useful)
5
unreasonable(adjective, fancy, high, extravagant, lavish)
4
exorbitant(adjective, fancy, high, extravagant, lavish)
4
pricey(adjective, fancy, high, lavish, expensive)
4
high(adjective, good, great, fancy, excellent)
4
inordinate(adjective, fancy, high, extravagant, lavish)
4
prized(adjective, important, useful, valuable, rare)
4
steep(adjective, fancy, high, expensive, exclusive)
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APASmart Define. (2015). invaluable thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/invaluable/thesaurus/synonyms
ChicagoSmart Define. 2015. "invaluable thesaurus" https://smartdefine.org/invaluable/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, invaluable thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/invaluable/thesaurus/synonyms>.
MLASmart Define. "invaluable thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/invaluable/thesaurus/synonyms>