unassailable vs inviolable

unassailable and inviolable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unassailable	No	Yes	No	No
inviolable	No	Yes	No	No

As adjectives, unassailable and inviolable are synonyms defined as:

unassailable and inviolable: immune to attack; incapable of being tampered with

Other synonyms of unassailable include impregnable, secure, strong, unattackable.

unassailable (adjective)	inviolable (adjective)
without flaws or loopholes	incapable of being transgressed or dishonored
impossible to assail	not capable of being violated or infringed
immune to attack; incapable of being tampered with	immune to attack; incapable of being tampered with
	must be kept sacred