in any event vs in any case

in any event and in any case both are adverbs.

Word	Noun	Adjective	Verb	Adverb
in any event	No	No	No	Yes
in any case	No	No	No	Yes

As adverbs, in any event and in any case are synonyms defined as:

in any event and in any case: used to indicate that a statement explains or supports a previous statement

Other synonyms of in any event include anyhow, anyway, anyways, at any rate.

in any event (adverb)	in any case (adverb)
used to indicate that a statement explains or supports a previous statement	used to indicate that a statement explains or supports a previous statement
	making an additional point; anyway