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

See also: retarded

• factor XI
• factor XII
• factor XIII
• factorage
• factorial
• factoring
• factorisation
• factorise
• factorization
• factorize
• factory
• factory farm
• factory price
• factory ship
• factory whistle
• factory worker
• factory-made
• factotum
• facts of life
• factual
• factuality
• factually
• factualness
• factum
• facture