segmentation vs cell division

segmentation and cell division both are nouns.

Word	Noun	Adjective	Verb	Adverb
segmentation	Yes	No	No	No
cell division	Yes	No	No	No

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

segmentation: (embryology) the repeated division of a fertilised ovum
cell division: the process in reproduction and growth by which a cell divides to form daughter cells

Other hypernyms of segmentation include cellular division.

segmentation (noun)	cell division (noun)
the act of dividing or partitioning; separation by the creation of a boundary that divides or keeps apart	the process in reproduction and growth by which a cell divides to form daughter cells
(embryology) the repeated division of a fertilised ovum