tetragen vs carbon group element

tetragen and carbon group element both are nouns.

Word	Noun	Adjective	Verb	Adverb
tetragen	Yes	No	No	No
carbon group element	Yes	No	No	No

As nouns, tetragen and carbon group element are synonyms defined as:

tetragen and carbon group element: any chemical element that belongs to the carbon group.

Other synonyms of tetragen include crystallogen, Group 14 element, tetrel.

tetragen (noun)	carbon group element (noun)
any chemical element that belongs to the carbon group.	any chemical element that belongs to the carbon group.