For all I know, conceivably, and feasibly are all synonyms for perhaps. Definitely and certainly are antonyms of perhaps. And here are 16 another word for perhaps.
Conceivably, feasibly, for all i know, for all you know, haply, happen, it could be (that), it is possible (that), it may be (that), maybe, mayhap, peradventure, perchance, possibly, and percase are all synonyms for perhaps.
Perhaps synonym page has a variety of synonyms that differ in length. 2 synonyms with 5, 6, 8, and 13 letters and 1 synonym with 9, 12, and 16 letters. 3 synonyms with 11 letters. For a total of 14 another word for perhaps.
Perhaps we should try again later.
She might, perhaps, join us today.
Perhaps it's time to leave now.
He was, perhaps, too ambitious.