Synonyms|92Antonyms|119|Broader|45Narrower|34Related|248

109 entries under adjective topic. ×

7
worthwhile(support, quality, maintenance)
5
acceptable(characteristic, quality, rationality, relevance)
5
reasonable(characteristic, quality, rationality, relevance)
4
good(quality, relevance, applicability)
4
strong(characteristic, rationality, reliance)
3
eco-friendly(nature, characteristic, defence)
3
appropriate(quality, relevance, applicability)
3
balanced(nature, characteristic, ecology)
3
defendable(characteristic, rationality, reliance)
3
ecological(nature, characteristic, ecology)
3
environmental(nature, characteristic, ecology)
3
natural(nature, characteristic, ecology)
3
proper(quality, relevance, applicability)
3
right(quality, relevance, applicability)
3
secure(characteristic, rationality, reliance)
3
sound(characteristic, rationality, reliance)
2
applicable(quality, relevance, applicability)
2
apposite(quality, relevance, applicability)
2
apt(quality, relevance, applicability)
2
arguable(characteristic, rationality, reliance)
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APASmart Define. (2015). unsustainable thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unsustainable/thesaurus/antonyms
ChicagoSmart Define. 2015. "unsustainable thesaurus" https://smartdefine.org/unsustainable/thesaurus/antonyms (accessed September 29, 2026).
HarvardSmart Define 2015, unsustainable thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unsustainable/thesaurus/antonyms>.
MLASmart Define. "unsustainable thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/unsustainable/thesaurus/antonyms>