transmute
Meaning: to change or alter in form
Usage: Ancient alchemists believed that it was possible to transmute lead into gold.
metamorphosis
Meaning: the change of form, shape, substance
Usage: Winnifred went to the gym every day for a year and underwent a metamorphosis from a waiflike girl to an athletic woman.
mutate
Meaning: to change in form or nature
Usage: The virus can mutate quickly over time.
transfigure
Meaning: to transform in appearance or character
Usage: The sunrise seemed to transfigure the gray valley into a golden landscape.
convert
Meaning: to change from one form, belief, or use to another
Usage: The engineers planned to convert the old warehouse into a library.