einsteinium vs metallic element

einsteinium and metallic element both are nouns.

Word	Noun	Adjective	Verb	Adverb
einsteinium	Yes	No	No	No
metallic element	Yes	No	No	No

As nouns, metallic element is a hypernym of einsteinium; that is, metallic element is a word with a broader meaning than einsteinium:

einsteinium: a radioactive transuranic element produced by bombarding plutonium with neutrons
metallic element: any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.

Other hypernyms of einsteinium include metal.

einsteinium (noun)	metallic element (noun)
a radioactive transuranic element produced by bombarding plutonium with neutrons	any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.