● Retardation
● Mental retardation
● Backwardness
● Deceleration
● Slowness
● Lag
● Slowing
● Slowdown
● Subnormality
● Retard
● Disability
● Stunting
● Underdevelopment
● Impairment
● Deficiency
● Impairments
● Infirmity
● Slippage
● Delay
● Failure
● Braking
● Delays
● Delayed
● Tardiness
● Lagging
● Lateness
● Ticking
● Backlog
● Shortcoming
● Delaying
● Overdue
● Postponement
● Downturn
● Gap
● Iate
● Behind
● Late
● Schedule
● Hypotonia
● Cretinism
● Psychosis
● Psychomotor
● Malformation
● Microcephaly
● Senility
● Dissociative disorder
● Retardate
● Mentally retarded
● Retardment
● Neuromotor
● Hirsutism
● Debilitation
● Ossification
● Torticollis
● Deformities
● Kwashiorkor
● Involution
● Masculinisation
● Anencephaly
● Dysphasia
● Diabetes insipidus
● Maladjustment
● Rh incompatibility
● Malnourishment
● Parkinsonism
● Williams syndrome
● Dementia praecox
● Osteopetrosis
● Osteomalacia
● Genetic abnormality
● Debility
● Goitre
● Hydrocephaly
● Puerperal
● Metabolic disorder
● Abnormalities
● Pseudocyesis
● Hypothyroidism
● Pubertal
● Repolarization
● Sensorineural hearing loss
● Anosognosia
● Coprolalia
● Exotropia
● Tardation
● Echolalia
● Suggestibility
● Tertiary syphilis
● Marasmus
● Psychopathic personality
● Onsets
● Hydrops
● Paraphilia
● Esotropia
● Chromosomal anomaly
● Hyperinsulinism
● Hemiplegia
● Epileptogenic
● Malabsorption
● Affective disorder