demented vs unbalanced

demented and unbalanced both are adjectives.

Word	Noun	Adjective	Verb	Adverb
demented	No	Yes	No	No
unbalanced	No	Yes	No	No

As adjectives, demented and unbalanced are synonyms defined as:

Other synonyms of demented include brainsick, crazy, disturbed, mad, sick, unhinged.

demented (adjective)	unbalanced (adjective)
affected with madness or insanity	being or thrown out of equilibrium
	affected with madness or insanity
	debits and credits are not equal