damage vs smash up

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

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

As verbs, smash up is a hyponym of damage; that is, smash up is a word with a more specific, narrower meaning than damage:

damage (noun)	smash up (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

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