Graph:

Chart used to show change.

I use graphs often in math.

Geography:
the study of the earth land and its changes
Mr. Zandlo has to know a lot about the earth because he teaches geography.

Telegraph
A letter vocalized by someone appointed to do so
On my birthday the mailman sang me a telegraph.

Graphite
A soft allotope of carbon with a metallic luster and gresy feel
Graphite replaced lead in pencils because it has the same characteristics but is not dangerous.

Paragraph
A division of a written work that is distinct to the other parts of the writting
My conclusion paragraph summed up my whole essay.


Calligraphy
The art of fine handwriting
It took me a long time to learn calligraphy.