probably as in with considerable certainty

• "without much doubt"
• "He is probably out of the country"
• "in all likelihood we are headed for war"

Synonyms

• likelywith considerable certainty; has a good chance of being the case or of coming about; likely but not certain to be or become true or real; expected to become or be; within the realm of credibility
• in all likelihoodwith considerable certainty
• in all probabilitywith considerable certainty
• belikewith considerable certainty

probably as in easy to believe on the basis of available evidence

• "he talked plausibly before the committee"
• "he will probably win the election"

Synonyms

• crediblyeasy to believe on the basis of available evidence
• believablyin a believable manner; easy to believe on the basis of available evidence
• plausiblyeasy to believe on the basis of available evidence