unaggressive vs nonaggressive

unaggressive and nonaggressive both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unaggressive	No	Yes	No	No
nonaggressive	No	Yes	No	No

As adjectives, unaggressive and nonaggressive are synonyms defined as:

unaggressive and nonaggressive: not aggressive; not given to fighting or assertiveness

unaggressive (adjective)	nonaggressive (adjective)
not aggressive; not given to fighting or assertiveness	not aggressive; not given to fighting or assertiveness