Synonyms of 'with a vengeance'
▷ See vengeance
to the utmost
The problem has returned with a vengeance.
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You use extremely in front of adjectives and adverbs to emphasize that the specified quality is present to a very great degree.
Mobile phones are extremely common nowadays.
You use greatly to emphasize the degree or extent of something.
People would benefit greatly from a pollution-free vehicle.
Thesaurus for with a vengeance from the Collins English Thesaurus
If you say that something happens with a vengeance , you are emphasizing that it happens to a much greater extent than was expected .