Derelict1. (a.) Given up or forsaken by the natural owner or guardian; left and abandoned; as, derelict lands, dereliction of duty.
2. (a.) Lost; adrift; hence, wanting; careless; neglectful; unfaithful.
3. (n.) A thing voluntary abandoned or willfully cast away by its proper owner, especially a ship abandoned at sea.
4. (n.) A tract of land left dry by the sea, and fit for cultivation or use.
Thesaurus Entries
Bowery bum, DP, Ishmael, abandoned, battered, beachcomber, beat-up, beaten up, beggar, beggarly fellow, behindhand, blighter, broken-down, budmash, bum, bummer, caitiff, careless, cast-off, castaway, castoff, culpably negligent, declasse, decrepit, delinquent, deserted, desolate, devil, dilapidated, dilatory, dingy, disaffected, discard, discarded, disloyal, disowned, displaced person, disregardful, disused, dogie, down-and-out, drifter, drunkard, evictee, exile, expatriate, expellee, faded, faithless, FALSE, fickle, floater, flotsam, flotsam and jetsam, forsaken, foundling, good-for-naught, good-for-nothing, heedless, hobo, human wreck, in ruins, inadvertent, inattentive, inconstant, irresponsible, jetsam, jettisoned, junk, lagan, laissez-faire, lax, lazzarone, left, leper, loafer, loose, lowlife, malingerer, marooned, mauvais sujet, mean wretch, mucker, neglected, neglectful, neglecting, negligent, no-good, noninterfering, nonrestrictive, not true to, of bad faith, off-guard, orphan, outcast, outcast of society, outcaste, outlaw, outside the gates, outside the pale, overly permissive, pariah, pauvre diable, permissive, persona non grata, pilgarlic, poor creature, poor devil, procrastinating, ramshackle, recreant, refuse, regardless, reject, rejected, relaxed, remiss, rubbish, ruined, ruinous, run-down, sad case, sad sack, scamping, seedy, shabby, skid-row bum, skimping, slack, slacker, slighting, slipshod, sloppy, slovenly, slummy, slurring, social outcast, solitary, stiff, street arab, sundowner, swagman, threadbare, tottery, tramp, trash, trothless, truant, tumbledown, unacceptable person, uncircumspect, uncouth, undependable, undesirable, unfaithful, unguarded, unloyal, unreliable, unrigorous, unsteadfast, untouchable, untrue, untrustworthy, unwary, unwatchful, vag, vagabond, vagrant, vaurien, waif, waifs and strays, wastrel, worthless fellow, wretch