| harmful(adjective, good, bad, disagreeable, harmless) | |
| detrimental(adjective, good, damaging, disadvantageous) | |
| unhelpful(adjective, bad, disagreeable, helpful) | |
| bad(adjective, disagreeable, harmful) | |
| unfavorable | |
| destructive | |
| not helpful | |
| injurious(adjective, good, bad, disagreeable, hurtful) | |
| unprofitable(adjective, useless) | |
| baneful(adjective, injurious, ruinous) | |
| disadvantageous(adjective, bad, disagreeable) | |
| adverse | |
| unfortunate(adjective, bad, disagreeable) | |
| insalubrious | |
| deleterious | |
| hurtful(adjective, bad, kind, friendly, disagreeable) | |
| self-destructive | |
| unfriendly | |
| useless(adjective, bad, disagreeable) | |
| damaging |
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| APA | Smart Define. (2016). beneficial thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/beneficial/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "beneficial thesaurus" https://smartdefine.org/beneficial/thesaurus/antonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2016, beneficial thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/beneficial/thesaurus/antonyms>. |
| MLA | Smart Define. "beneficial thesaurus" 24 March 2016. Web. 28 September 2026. <https://smartdefine.org/beneficial/thesaurus/antonyms> |