developmentally challenged developmentally • developmental psychology · · · Info · Definitions · Synonyms · Characters · · developmentally challenged · · Text Common · · Latin · · Scripts 26 · · Length 8 · · Syllables Definitions · · · (noun) people collectively who are mentally retarded. Synonyms: mentally retarded, retarded, developmentally challenged. Example: "He started a school for the retarded." · · Noun Definition 1 Synonyms · · · mentally retarded · · Synonym 1 retarded · · Synonym 2 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 g latin small letter g U+0067 h latin small letter h U+0068 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 t latin small letter t U+0074 v latin small letter v U+0076 y latin small letter y U+0079