182 entries under dull topic. ×
| inane(adjective, weak, boring, tedious) | |
| leaden(adjective, soft, obscure, flat) | |
| long-drawn-out(adjective, late, behind) | |
| low(soft, flat, dark, cold) | |
| mind-numbing(adjective, dry, boring, tedious) | |
| moth-eaten(adjective, hard, stupid, tedious) | |
| muted(adjective, weak, soft, obscure) | |
| off(late, behind) | |
| overdue(late, behind) | |
| passionless(adjective, quiet, cool, flat) | |
| prosy(adjective, weak, simple, flat) | |
| quiescent(calm, cold, still, lifeless) | |
| sapless(adjective, weak, tedious, lifeless) | |
| sombre(adjective, flat, boring, lifeless) | |
| soulless(adjective, cold, lifeless, nonliving) | |
| stereotyped(adjective, hard, flat, stupid) | |
| stodgy(adjective, flat, stupid, dry) | |
| stuffy(adjective, flat, stupid, dry) | |
| stuporous(adjective, quiet, flat, informal) | |
| tardy(late, behind) |
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| APA | Smart Define. (2016). dead thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/dead/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "dead thesaurus" https://smartdefine.org/dead/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, dead thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/dead/thesaurus/synonyms>. |
| MLA | Smart Define. "dead thesaurus" 18 March 2016. Web. 25 September 2026. <https://smartdefine.org/dead/thesaurus/synonyms> |