Yolk (Noun) = The yellow portion of the egg.
Synonyms: Vitellus, Nucellus.
Example: The yolk of the neck is nutritious.
Yoke (Noun) = Bondage.
Wooden structure put onb a bullock's neck.
Synonyms: Burden, Chain, Knot, Ligament, Nexus.
Example: They work under the yoke of slavery.