mundane vs unremarkable

mundane and unremarkable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
mundane	No	Yes	No	No
unremarkable	No	Yes	No	No

As adjectives, mundane and unremarkable are synonyms defined as:

Other synonyms of mundane include everyday, quotidian, routine, workaday.

mundane (adjective)	unremarkable (adjective)
belonging to this earth or world; not ideal or heavenly	found in the ordinary course of events
found in the ordinary course of events
concerned with the world or worldly matters