tetrel vs crystallogen

tetrel and crystallogen both are nouns.

Word	Noun	Adjective	Verb	Adverb
tetrel	Yes	No	No	No
crystallogen	Yes	No	No	No

As nouns, tetrel and crystallogen are synonyms defined as:

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

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

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