Synonyms of possibly

Adverb

1. possibly, perchance, perhaps, maybe, mayhap, peradventure

usage: by chance; "perhaps she will call tomorrow"; "we may possibly run into them at the concert"; "it may peradventure be thought that there never was such a time"

2. possibly

usage: to a degree possible of achievement or by possible means; "they can't possibly get here in time for the funeral?"

Definition and meaning of possibly (Dictionary)