block off vs bar

block off is not a noun while bar is a noun.

Word	Noun	Adjective	Verb	Adverb
block off	No	No	Yes	No
bar	Yes	No	Yes	No

As verbs, block off and bar are synonyms defined as:

Other synonyms of block off include barricade, block, block up, blockade, stop.

As verbs, bar is a hypernym of block off; that is, bar is a word with a broader meaning than block off:

Other hypernyms of block off include barricade, block, block off, block up, blockade, stop.

block off (noun)	bar (noun)
	the act of preventing
	a rigid piece of metal or wood; usually used as a fastening or obstruction or weapon
	an obstruction (usually metal) placed at the top of a goal
	a room or establishment where alcoholic drinks are served over a counter
	a counter where you can obtain food or drink
	a block of solid substance (such as soap or wax)
	(law) a railing that encloses the part of the courtroom where the judges and lawyers sit and the case is tried
	a heating element in an electric fire
	a horizontal rod that serves as a support for gymnasts as they perform exercises
	a narrow marking of a different color or texture from the background
	musical notation for a repeating pattern of musical beats
	the body of individuals qualified to practice law in a particular jurisdiction
	a submerged (or partly submerged) ridge in a river or along a shore
	(meteorology) a unit of pressure equal to a million dynes per square centimeter

block off (verb)	bar (verb)
obstruct access to	prevent from entering; keep out
render unsuitable for passage	render unsuitable for passage
block off the passage through	secure with, or as if with, bars
	expel, as if by official decree