needfully vs necessarily

needfully and necessarily both are adverbs.

Word	Noun	Adjective	Verb	Adverb
needfully	No	No	No	Yes
necessarily	No	No	No	Yes

As adverbs, needfully and necessarily are synonyms defined as:

needfully (adverb)	necessarily (adverb)
in an essential manner	in an essential manner
	as a highly likely consequence
	in such a manner as could not be otherwise