in any case vs anyhow

in any case and anyhow both are adverbs.

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

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

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

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

in any case (adverb)	anyhow (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	in any way whatsoever