Apparently, all things being equal, and all things considered are all synonyms for probably. Unlikely and certainly are antonyms of probably. And here are 25 another word for probably.
All things being equal, all things considered, apparently, as like as not, as likely as not, doubtless, in all likelihood, in all probability, it may be, like enough, likely, maybe, most likely, no doubt, on the face of it, perhaps, possibly, presumably, prob, probs, ten to one, the chances are, very likely, and belike are all synonyms for probably.
Probably synonym page has a variety of synonyms that differ in length. 1 synonym with 4, 6, 9, 11, 15, and 16 letters and 2 synonyms with 5, 8, and 19 letters. 3 synonyms with 7, and 13 letters and 5 synonyms with 10 letters. For a total of 23 another word for probably.
"She will probably arrive late."
"I will probably go tomorrow."
"They’re probably already at home."
"He probably forgot about meeting."