as vs every bit

as and every bit both are adverbs.

Word	Noun	Adjective	Verb	Adverb
as	No	No	No	Yes
every bit	No	No	No	Yes

As adverbs, as and every bit are synonyms defined as:

Other synonyms of as include equally.

as (adverb)	every bit (adverb)
to the same degree (often followed by `as')	to the same degree (often followed by `as')