18
forever(adverb, everlasting, always, ever, repeatedly)
6
lastingly(adverb, repeatedly, perpetually, infinitely, persistently)
6
permanently(adverb, completely, certainly, definitely, repeatedly)
5
perpetually(adverb, constantly, repeatedly, infinitely, persistently)
4
everlastingly(adverb, constantly, repeatedly, perpetually, persistently)
4
persistently(adverb, tenaciously, permanently)
3
eternally(adverb, repeatedly, perpetually, infinitely, persistently)
3
immortally(adverb, repeatedly, perpetually, infinitely, persistently)
3
interminably(adverb, perpetually)
2
abidingly(adverb, permanently)
2
ceaselessly(adverb, perpetually)
2
constantly(adverb, perpetually, permanently)
2
continuingly
2
decisively(adverb, tenaciously)
2
durably(adverb, thoroughly, firmly, endlessly, sharply)
2
endlessly(adverb, perpetually)
2
fixedly(adverb, severely, thoroughly, strongly, firmly)
2
for good(expression, adverb, completely, certainly, definitely)
2
rigidly(adverb, well, severely, thoroughly, strongly)
2
stiffly(adverb, well, severely, thoroughly, strongly)
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APASmart Define. (2015). enduringly thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/enduringly/thesaurus/synonyms
ChicagoSmart Define. 2015. "enduringly thesaurus" https://smartdefine.org/enduringly/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, enduringly thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/enduringly/thesaurus/synonyms>.
MLASmart Define. "enduringly thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/enduringly/thesaurus/synonyms>