perchance vs possibly

perchance and possibly both are adverbs.

Word	Noun	Adjective	Verb	Adverb
perchance	No	No	No	Yes
possibly	No	No	No	Yes

As adverbs, perchance and possibly are synonyms defined as:

Other synonyms of perchance include maybe, mayhap, peradventure, perhaps.

perchance (adverb)	possibly (adverb)
through chance	by chance
by chance	to a degree possible of achievement or by possible means