nucleonics vs nuclear physics

nucleonics and nuclear physics both are nouns.

Word	Noun	Adjective	Verb	Adverb
nucleonics	Yes	No	No	No
nuclear physics	Yes	No	No	No

As nouns, nucleonics and nuclear physics are synonyms defined as:

nucleonics and nuclear physics: the branch of physics that studies the internal structure of atomic nuclei

Other synonyms of nucleonics include atomic physics.

nucleonics (noun)	nuclear physics (noun)
the branch of physics that studies the internal structure of atomic nuclei	the branch of physics that studies the internal structure of atomic nuclei