An angry face.
Put a big sign on each face of the building that can be seen from the road.
Word: "face"
different meanings

He cast a spell to cure warts.
He whispered a spell as he moved his hands.
Word: "spell"
the same meaning

We serve meals for the homeless.
The President's wisdom has served the country well.
Word: "serve"
different meanings

He stuck his head out the window.
They tracked him back toward the head of the stream.
Word: "head"
different meanings