divide vs isolate

divide is a noun but isolate is not a noun.

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

As verbs, isolate is a hyponym of divide; that is, isolate is a word with a more specific, narrower meaning than divide:

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

divide (verb)	isolate (verb)
perform a division	place or set apart
move or break apart	obtain in pure form
force, take, or pull apart	set apart from others
make a division or separation	separate (experiences) from the emotions relating to them
separate into parts or portions
act as a barrier between; stand between