Co and Higher-up

Co noun - A hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition.

Higher-up and co are semantically related. in person who manages an organization topic. In some cases you can use "Higher-up" instead a noun "Co".

Higher-up noun - One of greater rank or station or quality.

Co and higher-up are semantically related. Sometimes you can use "Co" instead a noun phrase "Higher-up".