shopworn vs old-hat

shopworn and old-hat both are adjectives.

Word	Noun	Adjective	Verb	Adverb
shopworn	No	Yes	No	No
old-hat	No	Yes	No	No

As adjectives, shopworn and old-hat are synonyms defined as:

Other synonyms of shopworn include banal, commonplace, hackneyed, stock, threadbare, timeworn, tired, trite, well-worn.

shopworn (adjective)	old-hat (adjective)
repeated too often; overfamiliar through overuse	out of fashion
worn or faded from being on display in a store	repeated too often; overfamiliar through overuse