divide vs rail off

divide is a noun but rail off is not a noun.

Word	Noun	Adjective	Verb	Adverb
divide	Yes	No	Yes	No
rail off	No	No	Yes	No

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

Other hyponyms of divide include partition, zone, break, break up, dispel, disperse, dissipate, scatter, rail, detach, close off, shut off.

divide (noun)	rail off (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)	rail off (verb)
perform a division	separate with a railing
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