sever vs divide

sever is not a noun while divide is a noun.

Word	Noun	Adjective	Verb	Adverb
sever	No	No	Yes	No
divide	Yes	No	Yes	No

As verbs, divide is a hypernym of sever; that is, divide is a word with a broader meaning than sever:

Other hypernyms of sever include disunite, part, separate.

sever (noun)	divide (noun)
	a ridge of land that separates two adjacent river systems
	a serious disagreement between two groups of people (typically producing tension or hostility)

sever (verb)	divide (verb)
cut off from a whole	perform a division
set or keep apart	move or break apart
	force, take, or pull apart
	make a division or separation
	separate into parts or portions
	act as a barrier between; stand between