As verbs the difference between weaken and damaged
is that weaken is to make weaker while damaged is (damage).
damaged
English
Verb
(head)
(damage)
Usage notes
* Nouns to which "damaged" is often applied: building, house, home, bridge, tree, street, road, vehicle, car, aircraft, ship, machine, goods, merchandize, material, stock, book, document, file, hard disk, skin, hair, tissue, joint, cartilage, baggage, reputation.