Sn vs Group 14 element

Sn and Group 14 element both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sn	Yes	No	No	No
Group 14 element	Yes	No	No	No

As nouns, Group 14 element is a hypernym of Sn; that is, Group 14 element is a word with a broader meaning than Sn:

Sn: a silvery malleable metallic element that resists corrosion; used in many alloys and to coat other metals to prevent corrosion; obtained chiefly from cassiterite where it occurs as tin oxide
Group 14 element: any chemical element that belongs to the carbon group.

Other hypernyms of Sn include metal, metallic element, carbon group element, crystallogen, tetragen, tetrel.

Sn (noun)	Group 14 element (noun)
a silvery malleable metallic element that resists corrosion; used in many alloys and to coat other metals to prevent corrosion; obtained chiefly from cassiterite where it occurs as tin oxide	any chemical element that belongs to the carbon group.