adjective
probable, apt, hopeful
Synonyms: acceptable, achievable, anticipated, assuring, attainable, believeable, conceivable, conjecturable, credible, destined, disposed, expected, fair, favorite, feasible, given to, imaginable, inclined, in favor of, inferable, in the cards, in the habit of, liable, odds-on, on the verge of, ostensible, plausible, possible, practicable, predisposed, presumable, promising, prone, rational, reasonable, seeming, subject to, supposable, tending, thinkable, true, up-and-coming, verisimilar, workable
Antonyms: implausible, inapt, unforeseeable, unlikely
adverb
probably
Synonyms: assumably, doubtless, doubtlessly, in all likelihood, in all probability, like as not, most likely, no doubt, presumably, presumptively, prima facie, seemingly, to all appearances
Antonyms: improbably, unlikely