smash up vs damage

smash up is not a noun while damage is a noun.

Word	Noun	Adjective	Verb	Adverb
smash up	No	No	Yes	No
damage	Yes	No	Yes	No

As verbs, damage is a hypernym of smash up; that is, damage is a word with a broader meaning than smash up:

smash up (noun)	damage (noun)
	the act of damaging something or someone
	any harm or injury resulting from a violation of a legal right
	the occurrence of a change for the worse
	loss of military equipment
	the amount of money needed to purchase something

smash up (verb)	damage (verb)
damage or destroy as if by violence	inflict damage upon
	suffer or be susceptible to damage