fusion vs coalition

fusion and coalition both are nouns.

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

As nouns, fusion and coalition are synonyms defined as:

fusion (noun)	coalition (noun)
the act of fusing (or melting) together	the union of diverse things into one body or form or group; the growing together of parts
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 organization of people (or countries) involved in a pact or treaty
the combining of images from the two eyes to form a single visual percept	the state of being combined into one body
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