whatsoever vs whatever

whatsoever and whatever both are adjectives.

Word	Noun	Adjective	Verb	Adverb
whatsoever	No	Yes	No	No
whatever	No	Yes	No	No

As adjectives, whatsoever and whatever are synonyms defined as:

whatsoever and whatever: one or some or every or all without specification; entity, elective existential pronoun; quantifier, elective existential

Other synonyms of whatsoever include any.

whatsoever (adjective)	whatever (adjective)
one or some or every or all without specification; entity, elective existential pronoun; quantifier, elective existential	one or some or every or all without specification; entity, elective existential pronoun; quantifier, elective existential