As a proper noun axe
is axis (world war two nation group).
As a noun copper is
(
lb) a reddish-brown, malleable, ductile metallic element with high electrical and thermal conductivity, symbol cu, and atomic number 29 or
copper can be (slang|law enforcement) a police officer.
As an adjective copper is
made of copper.
As a verb copper is
to sheathe or coat with copper.