carbon group element vs tetragen

carbon group element and tetragen both are nouns.

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

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

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

Other synonyms of carbon group element include crystallogen, Group 14 element, tetrel.

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