retiring vs unassuming

retiring and unassuming both are adjectives.

Word	Noun	Adjective	Verb	Adverb
retiring	No	Yes	No	No
unassuming	No	Yes	No	No

As adjectives, retiring and unassuming are synonyms defined as:

retiring (adjective)	unassuming (adjective)
not arrogant or presuming	not arrogant or presuming
of a person who has held and relinquished a position or office
reluctant to draw attention to yourself