bromide vs commonplace

bromide and commonplace both are nouns.

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

As nouns, bromide and commonplace are synonyms defined as:

Other synonyms of bromide include banality, cliche, platitude.

bromide (noun)	commonplace (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

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