conjointly vs jointly

conjointly and jointly both are adverbs.

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

As adverbs, conjointly and jointly are synonyms defined as:

Other synonyms of conjointly include collectively, together with.

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