| delayed(verb, late, overdue, belated, postponed) | |
| backward(adjective, ability, offensive, impulsive, late) | |
| slow(adjective, dull, ability, slow, offensive) | |
| feeble-minded(adjective, dull, ability, offensive, stupid) | |
| detained(verb, late, delayed, overdue, belated) | |
| impeded(verb, belated) | |
| simple(adjective, ability, offensive) | |
| behindhand(late, delayed, overdue) | |
| belated(late, delayed, overdue) | |
| half-baked(adjective, stupid, impulsive, impractical, doomed) | |
| half-witted(adjective, ability, offensive) | |
| hindered(verb, slowed) | |
| overdue(late, delayed, belated) | |
| tardy(adjective, late, delayed, overdue) | |
| dull(adjective, ability, offensive) | |
| idiotic(adjective, impulsive, impractical, half-baked, doomed) | |
| imbecile | |
| imbecilic(adjective, impulsive, impractical, half-baked, doomed) | |
| inhibited | |
| late(delayed, overdue) |
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| APA | Smart Define. (2016). retarded thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/retarded/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "retarded thesaurus" https://smartdefine.org/retarded/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, retarded thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/retarded/thesaurus/synonyms>. |
| MLA | Smart Define. "retarded thesaurus" 27 January 2016. Web. 22 September 2026. <https://smartdefine.org/retarded/thesaurus/synonyms> |