1) Banal 2) Commonplace 3) Hackneyed 4) In need of patching 5) Old-hat 6) Overfamiliar through overuse 7) Ragged 8) Repeated too often 9) Shabby 10) Shopworn 11) Stock 12) Tattered 13) Thin and tattered with age 14) Timeworn 15) Tired 16) Trite 17) Unoriginal 18) Unravelled 19) Well-worn 20) Worn 1) Banal 2) Fallacious 3) Hackneyed 4) Ratty 5) Scruffy 6) Seedy 7) Shabby 8) Stock 9) Timeworn 10) Torn 11) Trite 12) Unoriginal 13) Worn 14) Wornout 
• (a.) Worn to the naked thread; having the nap worn off; threadbare clothes. • (a.) Fig.: Worn out; as, a threadbare subject; stale topics and threadbare quotations.
Thread'bare` adjective 1. Worn to the naked thread; having the nap worn off; threadbare clothes. 'A threadbare cope.' Chaucer. 2. Fig.: Worn out; as, a threadbare subject; stale topics and threadbare quotations. Swift. 
[adj] - having the nap worn away so that the threads show through
thin and tattered with age[Intelligent words] thin and tattered with age