dissolution vs breakup

dissolution and breakup both are nouns.

Word	Noun	Adjective	Verb	Adverb
dissolution	Yes	No	No	No
breakup	Yes	No	No	No

As nouns, dissolution and breakup are synonyms defined as:

dissolution and breakup: the termination or disintegration of a relationship (between persons or nations)

dissolution (noun)	breakup (noun)
the termination or disintegration of a relationship (between persons or nations)	the termination or disintegration of a relationship (between persons or nations)
the termination of a meeting	coming apart
dissolute indulgence in sensual pleasure
separation into component parts
the process of going into solution