severally vs on an individual basis

severally and on an individual basis both are adverbs.

Word	Noun	Adjective	Verb	Adverb
severally	No	No	No	Yes
on an individual basis	No	No	No	Yes

As adverbs, severally and on an individual basis are synonyms defined as:

Other synonyms of severally include individually, one by one, separately, singly.

severally (adverb)	on an individual basis (adverb)
apart from others	apart from others
individually or separately
in the order given