13-letter words containing d, o, u, l, a, s
- sunday school — a school, now usually in connection with a church, for religious instruction on Sunday.
- superdiplomat — a highly skilled or powerful diplomat, a high-ranking diplomat
- undiagnosable — unable to be diagnosed
- undulationist — a subscriber to the theory that light is transmitted as waves
- unmetabolised — not metabolised
- zygodactylous — Also, zygodactylous. (of a bird) having the toes of each foot arranged in pairs, with two toes in front and two behind.