commonplace vs tired

commonplace is a noun but tired is not a noun.

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

As adjectives, commonplace and tired are synonyms defined as:

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

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

commonplace (adjective)	tired (adjective)
not challenging; dull and lacking excitement	depleted of strength or energy
repeated too often; overfamiliar through overuse	repeated too often; overfamiliar through overuse
completely ordinary and unremarkable