Synonyms for highly improbable

Synonyms for highly

extremely (incredibly, exceedingly, supremely >>)
particularly
most
heavily (largely, strongly, strong >>)
hugely (immensely, enormously, tremendously >>)
greatly
much
severely (seriously, badly, sorely >>)
very much

See all synonyms for highly

Synonyms for improbable

unlikely (implausible, impossible, inconceivable >>)
unbelievable

See all synonyms for improbable