dizygotic twin vs fraternal twin

dizygotic twin and fraternal twin both are nouns.

Word	Noun	Adjective	Verb	Adverb
dizygotic twin	Yes	No	No	No
fraternal twin	Yes	No	No	No

As nouns, dizygotic twin and fraternal twin are synonyms defined as:

dizygotic twin and fraternal twin: either of two twins who developed from two separate fertilized eggs

dizygotic twin (noun)	fraternal twin (noun)
either of two twins who developed from two separate fertilized eggs	either of two twins who developed from two separate fertilized eggs