segmentation vs sectionalisation

segmentation and sectionalisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
segmentation	Yes	No	No	No
sectionalisation	Yes	No	No	No

As nouns, segmentation and sectionalisation are synonyms defined as:

segmentation and sectionalisation: the act of dividing or partitioning; separation by the creation of a boundary that divides or keeps apart

Other synonyms of segmentation include division, partition, partitioning, sectionalization.

segmentation (noun)	sectionalisation (noun)
the act of dividing or partitioning; separation by the creation of a boundary that divides or keeps apart	the act of dividing or partitioning; separation by the creation of a boundary that divides or keeps apart
(embryology) the repeated division of a fertilised ovum