17
forever(adverb, everlasting, always, ever, perpetually)
5
firmly(adverb, severely, strongly, definitely, strictly)
5
permanently(adverb, stably)
5
solidly(adverb, severely, thoroughly, strongly, firmly)
5
stably(adverb, well, severely, thoroughly, strongly)
4
constantly(adverb, stably)
3
steadily(adverb, stably)
3
strongly(adverb, thoroughly, firmly, definitely, resolutely)
2
steadfastly(adverb, stably)
2
abidingly
2
endurably
2
enduringly(adverb, thoroughly, firmly, endlessly, sharply)
2
eternally
2
everlastingly
2
lastingly
2
perennially
2
perpetually
2
persistently(adverb, stably)
2
serviceably
2
sturdily(adverb, firmly, stably)
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APASmart Define. (2013). durably thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/durably/thesaurus/synonyms
ChicagoSmart Define. 2013. "durably thesaurus" https://smartdefine.org/durably/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2013, durably thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/durably/thesaurus/synonyms>.
MLASmart Define. "durably thesaurus" 17 June 2013. Web. 20 September 2026. <https://smartdefine.org/durably/thesaurus/synonyms>