imbalanced vs unbalanced

imbalanced and unbalanced both are adjectives.

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

As adjectives, imbalanced and unbalanced are synonyms defined as:

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