hold up vs attack

hold up is not a noun while attack is a noun.

Word	Noun	Adjective	Verb	Adverb
hold up	No	No	Yes	No
attack	Yes	No	Yes	No

hold up (noun)	attack (noun)
	(military) an offensive against an enemy (using weapons)
	a decisive manner of beginning a musical tone or phrase
	the act of attacking
	ideas or actions intended to deal with a problem or situation
	an offensive move in a sport or game
	strong criticism
	intense adverse criticism
	the onset of a corrosive or destructive process (as by a chemical agent)
	a sudden occurrence of an uncontrollable condition

hold up (verb)	attack (verb)
cause to be slowed down or delayed	begin to injure
be the physical support of; carry the weight of	set to work upon; turn one's energies vigorously to a task
hold up something as an example; hold up one's achievements for admiration	attack in speech or writing
rob at gunpoint or by means of some other threat	launch an attack or assault on; begin hostilities or start warfare with
continue to live and avoid dying	take the initiative and go on the offensive
resist or withstand wear, criticism, etc.	attack someone physically or emotionally
resist or confront with resistance