inevitably vs necessarily

inevitably and necessarily both are adverbs.

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

As adverbs, inevitably and necessarily are synonyms defined as:

Other synonyms of inevitably include needs, of necessity.

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