astonishment vs amazement

astonishment and amazement both are nouns.

Word	Noun	Adjective	Verb	Adverb
astonishment	Yes	No	No	No
amazement	Yes	No	No	No

As nouns, astonishment and amazement are synonyms defined as:

astonishment and amazement: the feeling that accompanies something extremely surprising

astonishment (noun)	amazement (noun)
the feeling that accompanies something extremely surprising	the feeling that accompanies something extremely surprising