As a verb expand
is (
label) to change (something) from a smaller form and/or size to a larger one.
As a noun excess is
the state of surpassing or going beyond limits; the being of a measure beyond sufficiency, necessity, or duty; that which exceeds what is usual or proper; immoderateness; superfluity; superabundance; extravagance; as, an excess of provisions or of light.
As an adjective excess is
more than is normal, necessary or specified.