cobalt 60 vs Co

cobalt 60 and Co both are nouns.

Word	Noun	Adjective	Verb	Adverb
cobalt 60	Yes	No	No	No
Co	Yes	No	No	No

As nouns, Co is a hypernym of cobalt 60; that is, Co is a word with a broader meaning than cobalt 60:

cobalt 60: a radioactive isotope of cobalt with mass number 60; a source of exceptionally intense gamma rays; used in radiation therapy
Co: a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition

Other hypernyms of cobalt 60 include atomic number 27, cobalt.

cobalt 60 (noun)	Co (noun)
a radioactive isotope of cobalt with mass number 60; a source of exceptionally intense gamma rays; used in radiation therapy	a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition