1
rare(adjective, precious, priceless, invaluable, irreplaceable)
1
relevant(adjective, important, useful, expensive, scarce)
1
respected(adjective, important, useful, expensive, scarce)
1
serviceable(adjective, important, useful, expensive, scarce)
1
substantial
1
treasured(adjective, important, useful, rare, expensive)
1
umpteen
1
umteen
1
unavoidable
1
unbounded
1
unevadable
1
unnumbered
1
unspecified
1
valued(adjective, important, useful, rare, expensive)
1
without price(expression, adjective, rare, precious, invaluable)
1
worth its weight in gold(expression, adjective, idiom, rare, precious)
1
worthwhile(adjective, important, useful, expensive, scarce)
0
absolute
0
alembicated
0
animals
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APASmart Define. (2015). inestimable thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/inestimable/thesaurus/synonyms
ChicagoSmart Define. 2015. "inestimable thesaurus" https://smartdefine.org/inestimable/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, inestimable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/inestimable/thesaurus/synonyms>.
MLASmart Define. "inestimable thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/inestimable/thesaurus/synonyms>