fission vs nuclear fission

fission and nuclear fission both are nouns.

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

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

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

fission (noun)	nuclear 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