zone vs separate off

zone is a noun but separate off is not a noun.

Word	Noun	Adjective	Verb	Adverb
zone	Yes	No	Yes	No
separate off	No	No	Yes	No

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

Other hyponyms of zone include screen off.

zone (noun)	separate off (noun)
(anatomy) any encircling or beltlike structure
a locally circumscribed place characterized by some distinctive features
an area or region distinguished from adjacent parts by a distinctive feature or characteristic
any of the regions of the surface of the Earth loosely divided according to latitude or longitude

zone (verb)	separate off (verb)
separate or apportion into sections	partition by means of a divider, such as a screen
regulate housing in; of certain areas of towns