invulnerable vs unassailable

invulnerable and unassailable both are adjectives.

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

invulnerable (adjective)	unassailable (adjective)
immune to attack; impregnable	without flaws or loopholes
	impossible to assail
	immune to attack; incapable of being tampered with