Wold, a hill; often used to mean open country.
Wood-craft, knowledge of the woods and of all creatures in them, e.g. "His wood-craft waxed so great, that he seemed the king of the creatures."
Wot, to know.
Wrack, strife, destruction, ruins. Wrack of a mighty battle, the dead left on the field.
Wrights, workmen, makers.
Writhen, bent, twisted out of shape, e.g. "Writhen and foul were the hands that made it glorious."
Written spear, a spear carved with letters or words.
Yearn, to long, to feel tenderness towards, e.g. "My heart to him doth yearn."
Yore, long ago; generally used in the expression "of yore," formerly, once upon a time.