1. Retarded in intellectual development
   - backward, half-witted, feebleminded

See also: retarded, slow-wittedness

• São Louis
• São Paulo
• São Thomé e Principe
• São Thomé e Principe monetary unit
• São Tiago Island
• São Tomé
• incautiousness
• incendiarism
• incendiary
• incendiary bomb
• incense
• incense cedar
• incense tree
• incense wood
• incensed
• incentive
• incentive option
• incentive program
• incentive scheme
• incentive stock option
• incentivise
• incentivize
• inception
• inceptive
• incertain