hold up vs assault

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

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

hold up (noun)	assault (noun)
	close fighting during the culmination of a military attack
	a threatened or attempted physical attack by someone who appears to be able to cause bodily harm if not stopped
	the crime of forcing a person to submit to sexual intercourse against his or her will

hold up (verb)	assault (verb)
cause to be slowed down or delayed	attack in speech or writing
be the physical support of; carry the weight of	attack someone physically or emotionally
hold up something as an example; hold up one's achievements for admiration	force (someone) to have sex against their will
rob at gunpoint or by means of some other threat
continue to live and avoid dying
resist or withstand wear, criticism, etc.
resist or confront with resistance