| rotten(useless, worthless, injurious, detrimental, crummy) | |
| sharp | |
| shocking | |
| slanderous(distressing, damaging) | |
| spiteful(cruel, corrupt, negative, immoral, unkind) | |
| surly(adjective, person, mean, bad, wrong) | |
| touchy(risky, dangerous, unsafe) | |
| troublesome(awful, terrible, dreadful, damaging, hurtful) | |
| unfriendly(adjective, person, mean, bad, wrong) | |
| unkind(adjective, person, mean, bad, wrong) | |
| unlucky | |
| unprofitable(damaging, disparaging, hurtful, detrimental, derogatory) | |
| upsetting(adjective, awful, terrible, cruel, unkind) | |
| villainous(awful, terrible, corrupt, immoral, dreadful) | |
| wasteful | |
| worthless(adjective, useless, second-rate, crummy) | |
| wretched | |
| base | |
| agonizing | |
| aloof(adjective, person, unfriendly) |
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| APA | Smart Define. (2016). harmful thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/harmful/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "harmful thesaurus" https://smartdefine.org/harmful/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, harmful thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/harmful/thesaurus/synonyms>. |
| MLA | Smart Define. "harmful thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/harmful/thesaurus/synonyms> |