Synonyms of adv probably

2 senses of probably

Sense 1
probably, likely, in all likelihood, in all probability, belike -- (with considerable certainty; without much doubt; "He is probably out of the country"; "in all likelihood we are headed for war")

Sense 2
credibly, believably, plausibly, probably -- (easy to believe on the basis of available evidence; "he talked plausibly before the committee"; "he will probably win the election")