perpetually vs forever

perpetually and forever both are adverbs.

Word	Noun	Adjective	Verb	Adverb
perpetually	No	No	No	Yes
forever	No	No	No	Yes

As adverbs, perpetually and forever are synonyms defined as:

Other synonyms of perpetually include always, constantly, incessantly.

perpetually (adverb)	forever (adverb)
invariably	for a limitless time
everlastingly; for all time	for a very long or seemingly endless time
	invariably