Synonyms for probably

Adverb

1. probably, likely, in all likelihood, in all probability, belike,probable (vs. improbable), likely, plausible

usage: with considerable certainty; without much doubt; "He is probably out of the country"; "in all likelihood we are headed for war"

2. credibly, believably, plausibly, probably,probable (vs. improbable), likely, plausible

usage: easy to believe on the basis of available evidence; "he talked plausibly before the committee"; "he will probably win the election"