astonished vs stunned

astonished and stunned both are adjectives.

Word	Noun	Adjective	Verb	Adverb
astonished	No	Yes	No	No
stunned	No	Yes	No	No

As adjectives, astonished and stunned are synonyms defined as:

astonished and stunned: filled with the emotional impact of overwhelming surprise or shock

Other synonyms of astonished include amazed, astonied, astounded.

astonished (adjective)	stunned (adjective)
filled with the emotional impact of overwhelming surprise or shock	in a state of mental numbness especially as resulting from shock
	filled with the emotional impact of overwhelming surprise or shock
	knocked unconscious by a heavy blow