Yoke - a harness for animals, often oxen, usually made from wood
Jonah, please get the yoke from the barn and get the oxen ready.
Yolk - part of an egg
The yolk is the yellow part of the egg. Do you like it better than the white?
You - see Ewe
You'll - contraction for you will
You'll go to the Hallowe'en dance with me, won't you?
Yule(tide) - of the Christmas season
Grandma loves the Yuletide season.
Your - belonging to you
Your shorts have a rip in the back.
You're - contraction for you are
If you're not going to eat that cookie, then I will. (If you are not)
Yore - olden
In days of yore people used buggies pulled by horses.
Yew - see Ewe