209 entries under noun topic. ×

10
deceleration
10
lag(time, help, check, delay)
10
slowdown(decrease, off)
10
slowing
9
delay(time, help, check, disorder)
9
hindrance(support, check, disorder, delay)
9
obstruction(support, check, disorder, delay)
9
slowness(slowness, tardiness, underdevelopment, unpunctuality)
8
backwardness
7
check(verb, support, disorder, delay)
7
impediment(support, check, disorder, delay)
6
mental retardation(expression, idiom)
6
retardment(check, disorder, delay, stay)
6
stoppage(check, disorder, delay, stay)
5
detainment(time, help, check, delay)
5
detention(support, check, delay, fight)
5
holdup(time, help, check, delay)
5
inhibition(weakness, hindrance, impairment, disablement)
5
interruption(delay, decrease, stay, wait)
5
resistance(conflict, opposition, obstruction, fighting)
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APASmart Define. (2015). retardation thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/retardation/thesaurus/synonyms
ChicagoSmart Define. 2015. "retardation thesaurus" https://smartdefine.org/retardation/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, retardation thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/retardation/thesaurus/synonyms>.
MLASmart Define. "retardation thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/retardation/thesaurus/synonyms>