commonplace vs shopworn

commonplace is a noun but shopworn is not a noun.

Word	Noun	Adjective	Verb	Adverb
commonplace	Yes	Yes	No	No
shopworn	No	Yes	No	No

As adjectives, commonplace and shopworn are synonyms defined as:

commonplace and shopworn: repeated too often; overfamiliar through overuse

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

commonplace (noun)	shopworn (noun)
a trite or obvious remark

commonplace (adjective)	shopworn (adjective)
not challenging; dull and lacking excitement	repeated too often; overfamiliar through overuse
repeated too often; overfamiliar through overuse	worn or faded from being on display in a store
completely ordinary and unremarkable