| hardened(adjective, hard, firm, solid, usual) | |
| heedless(adjective, careless, thoughtless, unthinking, inconsiderate) | |
| ho-hum | |
| homogeneous | |
| humdrum | |
| immalleable(adjective, hard, firm, solid, stiff) | |
| immediate | |
| immutable | |
| impliable(adjective, hard, firm, solid, stiff) | |
| inattentive(adjective, unthinking, superficial, dutiful, sketchy) | |
| incompliant(adjective, hard, firm, solid, tense) | |
| indifferent(adjective, unthinking, superficial, dutiful, sketchy) | |
| indurate(adjective, hard, firm, solid, tense) | |
| inelastic(adjective, hard, firm, solid, stiff) | |
| inflexible(adjective, hard, firm, solid, stiff) | |
| invariable | |
| jelled(adjective, hard, firm, solid, tense) | |
| laborsaving(adjective, done, powered, motorized, power-driven) | |
| lackadaisical(adjective, unthinking, superficial, dutiful, sketchy) | |
| level |
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| APA | Smart Define. (2015). mechanical thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/mechanical/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "mechanical thesaurus" https://smartdefine.org/mechanical/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, mechanical thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/mechanical/thesaurus/synonyms>. |
| MLA | Smart Define. "mechanical thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/mechanical/thesaurus/synonyms> |