22
forever(adverb, everlasting, always, ever, perpetually)
13
endlessly(adverb, perpetually, in perpetuity)
11
eternally(adverb, perpetually, in perpetuity)
10
perpetually(adverb, in perpetuity)
9
continually(adverb, perpetually, in perpetuity)
7
incalculably(adverb, greatness, very, really, seriously)
7
boundlessly
7
illimitably
7
immeasurably(adverb, greatness)
7
interminably(adverb, perpetually)
7
limitlessly
7
vastly(adverb, very, really, seriously, deeply)
6
ceaselessly(adverb, perpetually)
6
everlastingly(adverb, perpetually)
6
immensely(adverb, very, really, seriously, greatly)
6
indefinitely(adverb, greatness, very, extremely, unusually)
5
extremely(adverb, greatness, very, really, seriously)
5
incessantly(adverb, perpetually)
5
unendingly
4
ad infinitum(expression, idiom, infinity)
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APASmart Define. (2015). infinitely thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/infinitely/thesaurus/synonyms
ChicagoSmart Define. 2015. "infinitely thesaurus" https://smartdefine.org/infinitely/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, infinitely thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/infinitely/thesaurus/synonyms>.
MLASmart Define. "infinitely thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/infinitely/thesaurus/synonyms>