fusion vs unification

fusion and unification both are nouns.

Word	Noun	Adjective	Verb	Adverb
fusion	Yes	No	No	No
unification	Yes	No	No	No

As nouns, fusion and unification are synonyms defined as:

fusion and unification: an occurrence that involves the production of a union

Other synonyms of fusion include merger.

As nouns, unification is a hypernym of fusion; that is, unification is a word with a broader meaning than fusion:

Other hypernyms of fusion include union.

fusion (noun)	unification (noun)
the act of fusing (or melting) together	the act of making or becoming a single unit
correction of an unstable part of the spine by joining two or more vertebrae; usually done surgically but sometimes done by traction or immobilization	an occurrence that involves the production of a union
the combining of images from the two eyes to form a single visual percept	the state of being joined or united or linked
an occurrence that involves the production of a union
a nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
the merging of adjacent sounds or syllables or words
the state of being combined into one body