Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb astonish

1 sense of astonish

Sense 1
amaze, astonish, astound -- (affect with wonder; "Your ability to speak six languages amazes me!")
       => surprise -- (cause to be surprised; "The news really surprised me")

Antonyms of adj astonishing

2 senses of astonishing

Sense 1
amazing, astonishing -- (surprising greatly; "she does an amazing amount of work"; "the dog was capable of astonishing tricks")

INDIRECT (VIA surprising) -> unsurprising -- (not causing surprise)

Sense 2
astonishing, astounding, staggering, stupefying -- (so surprisingly impressive as to stun or overwhelm; "such an enormous response was astonishing"; "an astounding achievement"; "the amount of money required was staggering"; "suffered a staggering defeat"; "the figure inside the boucle dress was stupefying")

INDIRECT (VIA impressive) -> unimpressive -- (not capable of impressing)

Similarity of adj astonishing

2 senses of astonishing

Sense 1
amazing, astonishing -- (surprising greatly; "she does an amazing amount of work"; "the dog was capable of astonishing tricks")
       => surprising (vs. unsurprising) -- (causing surprise or wonder or amazement; "the report shows a surprising lack of hard factual data"; "leaped up with surprising agility"; "she earned a surprising amount of money")

Sense 2
astonishing, astounding, staggering, stupefying -- (so surprisingly impressive as to stun or overwhelm; "such an enormous response was astonishing"; "an astounding achievement"; "the amount of money required was staggering"; "suffered a staggering defeat"; "the figure inside the boucle dress was stupefying")
       => impressive (vs. unimpressive) -- (making a strong or vivid impression; "an impressive ceremony")