morphology
the study of form
Today this word meansThe science of biological form. In linguistics, the structure of words.
From Greek morphē, form. Morpheus, god of dreams, is the same word — because in dreams he borrows human shape.
Metamorphosis shares the root: meta (change) + morphē (form).
Worth noting
The word did not come from the god's name; the same word simply doubled as his name.