cobalt vs Co

cobalt and Co both are nouns.

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

As nouns, cobalt and Co are synonyms defined as:

cobalt and Co: a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition

Other synonyms of cobalt include atomic number 27.

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