- dyslexiaA learning disability characterized by reading and writing difficulties.
- dystopiaA miserable, dysfunctional state or society that has a very poor standard of living or severe censorship, oppression, etc.
- DesdemonaOthello's wife in Shakespeare's play The Tragedy of Othello, the Moor of Venice, noted for being a victim of jealousy.
- dyscalculiaA learning disability characterized by significantly below average mathematical ability.
- dys-difficult
- dysbiosisA medical condition caused by microbial imbalances within the body.
- dysgenicOf or relating to, or causing degeneration or deterioration in offspring.