fragmentation vs division

fragmentation and division both are nouns.

Word	Noun	Adjective	Verb	Adverb
fragmentation	Yes	No	No	No
division	Yes	No	No	No

As nouns, division is a hypernym of fragmentation; that is, division is a word with a broader meaning than fragmentation:

fragmentation (noun)	division (noun)
separating something into fine particles	the act or process of dividing
the scattering of bomb fragments after the bomb explodes	an arithmetic operation that is the inverse of multiplication; the quotient of two numbers is computed
(computer science) the condition of a file that is broken up and stored in many different locations on a magnetic disk	the act of dividing or partitioning; separation by the creation of a boundary that divides or keeps apart
the disintegration of social norms governing behavior and thought and social relationships	one of the portions into which something is regarded as divided and which together constitute a whole
	discord that splits a group
	an army unit large enough to sustain combat
	a group of ships of similar type
	a unit of the United States Air Force usually comprising two or more wings
	an administrative unit in government or business
	(botany) taxonomic unit of plants corresponding to a phylum
	(biology) a group of organisms forming a subdivision of a larger category
	a league ranked by quality