The formation of crystals.
The formation of gas in the intestine.
Word: "formation"
the same meaning

"The quality of mercy is not strained" -- Shakespeare.
Security, stability, and efficiency are good qualities of an operating system.
Word: "quality"
the same meaning

A lot of money.
He bought a lot on the lake.
Word: "lot"
different meanings

You had better pack your swollen ankle with ice.
Pack your tents to the top of the mountain.
Word: "pack"
different meanings