55 entries under immense topic. ×

1
unbroken(constant, abundant, unrestrained, endless)
1
undivided(constant, abundant, unrestrained, endless)
1
undying(constant, abundant, unrestrained, infinite)
1
unending(adjective, constant, abundant, unrestrained, endless)
1
unfathomed(adjective, complete, absolute, unrestrained, extensive)
1
unfettered(adjective, complete, absolute, unrestrained, extensive)
1
uninterrupted(constant, abundant, unrestrained, endless)
1
unrestrained(adjective, complete, absolute, abundant, extensive)
1
unsurpassable(constant, abundant, unrestrained, infinite)
1
wide open(expression, adjective, complete, absolute, unrestrained)
1
zillion(adjective, untidy, infinite, fluffy)
0
full-out(adjective, complete, absolute, unrestrained, extensive)
0
no holds barred(expression, infinite, boundless, unlimited)
0
uncalculable(infinite, boundless, unlimited, incomprehensible)
0
wide-open(infinite, boundless, unlimited, incomprehensible)
<123>
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APASmart Define. (2015). countless thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/countless/thesaurus/synonyms
ChicagoSmart Define. 2015. "countless thesaurus" https://smartdefine.org/countless/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, countless thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/countless/thesaurus/synonyms>.
MLASmart Define. "countless thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/countless/thesaurus/synonyms>