collectively vs jointly

collectively and jointly both are adverbs.

Word	Noun	Adjective	Verb	Adverb
collectively	No	No	No	Yes
jointly	No	No	No	Yes

As adverbs, collectively and jointly are synonyms defined as:

Other synonyms of collectively include conjointly, together with.

collectively (adverb)	jointly (adverb)
in conjunction with; combined	in conjunction with; combined
	in collaboration or cooperation