restoration vs mending

restoration and mending both are nouns.

Word	Noun	Adjective	Verb	Adverb
restoration	Yes	No	No	No
mending	Yes	No	No	No

As nouns, mending is a hypernym of restoration; that is, mending is a word with a broader meaning than restoration:

restoration: the act of restoring something or someone to a satisfactory state
mending: the act of putting something in working order again

Other hypernyms of restoration include fix, fixing, fixture, mend, repair, reparation.

restoration (noun)	mending (noun)
the act of restoring something or someone to a satisfactory state	the act of putting something in working order again
getting something back again	garments that must be repaired
some artifact that has been restored or reconstructed
a model that represents the landscape of a former geological age or that represents and extinct animal etc.
the state of being restored to its former good condition