Synonyms of the word

probably

• adv. In all likelihood.

believably

• adv. In a believable way.
• adv. Used to express the speaker's assessment of the credibility of a reported statement.

belike

• v. (transitive) To make like; simulate.
• v. (transitive) To be like; resemble.
• v. (impersonal) To be pleasing to; please.
• v. (transitive) To like; be pleased with.
• n. An object of affection or liking.
• adv. (archaic or dialectal, Northern England) Likely, probably, perhaps.

credibly

• adv. In a credible manner; believably.
• adv. Used to report the speaker's assessment of the credibility of a reported statement.

likely

• adj. probable; having a greater-than-even chance of occurring.
• adj. (as predicate, followed by to and infinitive) Reasonably to be expected; apparently destined, probable.
• adj. appropriate, suitable; believable; having a good potential.
• adj. plausible; Within the realm of credibility.
• adj. promising; apt to achieve success or yield a desired outcome.
• adj. attractive; pleasant.
• adj. (obsolete) Similar; like; alike.
• adv. (obsolete) Similarly.
• adv. Probably.
• n. Something or somebody considered likely.

plausibly

• adv. (manner) In a plausible manner.
• adv. (modal) Not falsifiably, based on available facts and general knowledge.