affected vs unnatural

affected and unnatural both are adjectives.

Word	Noun	Adjective	Verb	Adverb
affected	No	Yes	No	No
unnatural	No	Yes	No	No

As adjectives, affected and unnatural are synonyms defined as:

affected and unnatural: speaking or behaving in an artificial way to make an impression

affected (adjective)	unnatural (adjective)
acted upon; influenced	not in accordance with or determined by nature; contrary to nature
speaking or behaving in an artificial way to make an impression	not normal; not typical or usual or regular or conforming to a norm
being excited or provoked to the expression of an emotion	speaking or behaving in an artificial way to make an impression