nuclear fission vs fission

nuclear fission and fission both are nouns.

Word	Noun	Adjective	Verb	Adverb
nuclear fission	Yes	No	No	No
fission	Yes	No	No	No

As nouns, nuclear fission and fission are synonyms defined as:

nuclear fission and fission: a nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy

nuclear fission (noun)	fission (noun)
a nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy	a nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
	reproduction of some unicellular organisms by division of the cell into two more or less equal parts