commonplace vs bromide

commonplace and bromide both are nouns.

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

As nouns, commonplace and bromide are synonyms defined as:

Other synonyms of commonplace include banality, cliche, platitude.

commonplace (noun)	bromide (noun)
a trite or obvious remark	a trite or obvious remark
	any of the salts of hydrobromic acid; formerly used as a sedative but now generally replaced by safer drugs

commonplace (adjective)	bromide (adjective)
not challenging; dull and lacking excitement
repeated too often; overfamiliar through overuse
completely ordinary and unremarkable