derelict
adjective
in a very poor condition as a result of disuse and neglect.
a derelict Georgian mansion
dilapidated,ramshackle,run down,broken-down,worn out,tumbledown,in (a state of) disrepair,in ruins,ruined,falling to pieces,falling apart,rickety,creaky,creaking,decrepit,deteriorating,crumbling,deteriorated,neglected,untended,unmaintained,gone to rack and ruin,gone to seed,on its last legs,the worse for wear,disused,abandoned,deserted,discarded,rejected,forsaken,cast off,relinquished,ownerless
noun
a person without a home, job, or property.
derelicts who could fit all their possessions in a paper bag
tramp,vagrant,vagabond,down and out,homeless person,drifter,knight of the road,beggar,mendicant,outcast,pariah,ne’er do well,good-for-nothing,wastrel,streety,dosser,bag lady,hobo,bum,derro