atomic number 82 vs tetragen

atomic number 82 and tetragen both are nouns.

Word	Noun	Adjective	Verb	Adverb
atomic number 82	Yes	No	No	No
tetragen	Yes	No	No	No

As nouns, tetragen is a hypernym of atomic number 82; that is, tetragen is a word with a broader meaning than atomic number 82:

atomic number 82: a soft heavy toxic malleable metallic element; bluish white when freshly cut but tarnishes readily to dull grey
tetragen: any chemical element that belongs to the carbon group.

Other hypernyms of atomic number 82 include metal, metallic element, carbon group element, crystallogen, Group 14 element, tetrel.

atomic number 82 (noun)	tetragen (noun)
a soft heavy toxic malleable metallic element; bluish white when freshly cut but tarnishes readily to dull grey	any chemical element that belongs to the carbon group.